SV-CF-2 - Eavesdropping

Eavesdropping (RF and proximity)

Informational References

DiD Layer: Data
CAPEC #:  117 | 619 | 623 | 651
NIST Rev5 Control Tag Mapping:  AC-3 | AC-3(10) | AC-4 | AC-4(23) | CA-3 | CA-3(7) | IA-7 | PE-19 | PE-19(1) | SA-3 | SA-3(1) | SA-8 | SA-8(18) | SC-7 | SC-7(18) | SC-13 | SC-28 | SC-28(1) | SI-7 | SI-7(6)
Lowest Threat Tier to
Create Threat Event:  
Notional Risk Rank Score: 9

High-Level Requirements

The spacecraft shall eliminate and then mitigate information leakage due to electromagnetic signals emanations.

Low-Level Requirements

Requirement Rationale/Additional Guidance/Notes
The spacecraft shall not employ a mode of operations where cryptography on the TT&C link can be disabled (i.e., crypto-bypass mode). {SV-AC-1,SV-CF-1,SV-CF-2} {AC-3(10)}
The spacecraft shall fail securely to a secondary device in the event of an operational failure of a primary boundary protection device (i.e., crypto solution). {SV-AC-1,SV-AC-2,SV-CF-1,SV-CF-2} {SC-7(18)}
The spacecraft shall implement cryptography for the indicated uses using the indicated protocols, algorithms, and mechanisms, in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards: [NSA- certified or approved cryptography for protection of classified information, FIPS-validated cryptography for the provision of hashing]. {SV-AC-1,SV-AC-2,SV-CF-1,SV-CF-2,SV-AC-3} {IA-7,SC-13} * Information at rest refers to the state of information when it is located on storage devices as specific components of information systems. This is often referred to as data-at-rest encryption.
The spacecraft shall protect the confidentiality and integrity of the [all information] using cryptography while it is at rest. {SV-IT-2,SV-CF-2} {SC-28,SC-28(1),SI-7(6)} This requirement applies if system components are being designed to address EMSEC and the measures taken to protect against compromising emanations must be in accordance with DODD S-5200.19, or superseding requirements.
See threat ID SV-AC-1 for crypto and auth requirements. But to protect for TEMPEST. The spacecraft shall be designed such that it protects itself from information leakage due to electromagnetic signals emanations. {SV-CF-2,SV-MA-2} {PE-19,PE-19(1)} The measures taken to protect against compromising emanations must be in accordance with DODD S-5200.19, or superseding requirements. The concerns addressed by this control during operation are emanations leakage between multiple payloads within a single space platform, and between payloads and the bus.
The spacecraft shall protect system components, associated data communications, and communication buses in accordance with: (i) national emissions and TEMPEST policies and procedures, and (ii) the security category or sensitivity of the transmitted information. {SV-CF-2,SV-MA-2} {PE-19,PE-19(1)}
The Program shall describe (a) the separation between RED and BLACK cables, (b) the filtering on RED power lines, (c) the grounding criteria for the RED safety grounds, (d) and the approach for dielectric separators on any potential fortuitous conductors. {SV-CF-2,SV-MA-2} {PE-19,PE-19(1)}

Related SPARTA Techniques and Sub-Techniques

ID Name Description
REC-0005 Eavesdropping Threat actors may seek to capture network communications throughout the ground station and radio frequency (RF) communication used for uplink and downlink communications. RF communication frequencies vary between 30MHz and 60 GHz. Threat actors may capture RF communications using specialized hardware, such as software defined radio (SDR), handheld radio, or a computer with radio demodulator turned to the communication frequency. Network communications may be captured using packet capture software while the threat actor is on the target network.
REC-0005.01 Uplink Intercept Threat actors may capture the RF communications as it pertains to the uplink to the victim spacecraft. This information can contain commanding information that the threat actor can use to perform other attacks against the victim spacecraft.
REC-0005.02 Downlink Intercept Threat actors may capture the RF communications as it pertains to the downlink of the victim spacecraft. This information can contain important telemetry such as onboard status and mission data.
REC-0005.03 Proximity Operations Threat actors may capture signals and/or network communications as they travel on-board the vehicle (i.e., EMSEC/TEMPEST), via RF, or terrestrial networks. This information can be decoded to determine commanding and telemetry protocols, command times, and other information that could be used for future attacks.
REC-0005.04 Active Scanning (RF/Optical) Threat actors may interfere with the link by actively transmitting packets to activate the transmitter and induce a reply. The scan can be similar to a brute force attack, aiming to guess the used frequencies and protocols to obtain a reply.
REC-0007 Monitor for Safe-Mode Indicators Threat actors may gather information regarding safe-mode indicators on the victim spacecraft. Safe-mode is when all non-essential systems are shut down and only essential functions within the spacecraft are active. During this mode, several commands are available to be processed that are not normally processed. Further, many protections may be disabled at this time.
IA-0005 Rendezvous & Proximity Operations Threat actors may perform a space rendezvous which is a set of orbital maneuvers during which a spacecraft arrives at the same orbit and approach to a very close distance (e.g. within visual contact or close proximity) to a target spacecraft.
IA-0005.01 Compromise Emanations Threat actors in close proximity may intercept and analyze electromagnetic radiation emanating from crypto equipment and/or the target spacecraft(i.e., main bus) to determine whether the emanations are information bearing. The data could be used to establish initial access.
IA-0005.02 Docked Vehicle / OSAM Threat actors may leverage docking vehicles to laterally move into a target spacecraft. If information is known on docking plans, a threat actor may target vehicles on the ground or in space to deploy malware to laterally move or execute malware on the target spacecraft via the docking interface.
IA-0005.03 Proximity Grappling Threat actors may posses the capability to grapple target spacecraft once it has established the appropriate space rendezvous. If from a proximity / rendezvous perspective a threat actor has the ability to connect via docking interface or expose testing (i.e., JTAG port) once it has grappled the target spacecraft, they could perform various attacks depending on the access enabled via the physical connection.
IA-0008 Rogue External Entity Threat actors may gain access to a victim spacecraft through the use of a rogue external entity. With this technique, the threat actor does not need access to a legitimate ground station or communication site.
IA-0008.02 Rogue Spacecraft Threat actors may gain access to a target spacecraft using their own spacecraft that has the capability to maneuver within close proximity to a target spacecraft to carry out a variety of TTPs (i.e., eavesdropping, side-channel, etc.). Since many of the commercial and military assets in space are tracked, and that information is publicly available, attackers can identify the location of space assets to infer the best positioning for intersecting orbits. Proximity operations support avoidance of the larger attenuation that would otherwise affect the signal when propagating long distances, or environmental circumstances that may present interference.
EX-0011 Exploit Reduced Protections During Safe-Mode Threat actors may take advantage of the victim spacecraft being in safe mode and send malicious commands that may not otherwise be processed. Safe-mode is when all non-essential systems are shut down and only essential functions within the spacecraft are active. During this mode, several commands are available to be processed that are not normally processed. Further, many protections may be disabled at this time.
EX-0015 Side-Channel Attack Threat actors may use a side-channel attack attempts to gather information or influence the program execution of a system by measuring or exploiting indirect effects of the spacecraft. Side-Channel attacks can be active or passive. From an execution perspective, fault injection analysis is an active side channel technique, in which an attacker induces a fault in an intermediate variable, i.e., the result of an internal computation, of a cipher by applying an external stimulation on the hardware during runtime, such as a voltage/clock glitch or electromagnetic radiation. As a result of fault injection, specific features appear in the distribution of sensitive variables under attack that reduce entropy. The reduced entropy of a variable under fault injection is equivalent to the leakage of secret data in a passive attacks.
LM-0003 Constellation Hopping via Crosslink Threat actors may attempt to command another neighboring spacecraft via crosslink. spacecraft in close proximity are often able to send commands back and forth. Threat actors may be able to leverage this access to compromise another spacecraft.
EXF-0001 Replay Threat actors may exfiltrate data by replaying commands and capturing the telemetry or payload data as it is sent down. One scenario would be the threat actor replays commands to downlink payload data once the spacecraft is within certain location so the data can be intercepted on the downlink by threat actor ground terminals.
EXF-0002 Side-Channel Attack Threat actors may use a side-channel attack attempts to gather information by measuring or exploiting indirect effects of the spacecraft. Information within the spacecraft can be extracted through these side-channels in which sensor data is analyzed in non-trivial ways to recover subtle, hidden or unexpected information. A series of measurements of a side-channel constitute an identifiable signature which can then be matched against a signature database to identify target information, without having to explicitly decode the side-channel.
EXF-0002.01 Power Analysis Attacks Threat actors can analyze power consumption on-board the spacecraft to exfiltrate information. In power analysis attacks, the threat actor studies the power consumption of devices, especially cryptographic modules. Power analysis attacks require close proximity to a sensor node, such that a threat actor can measure the power consumption of the sensor node. There are two types of power analysis, namely simple power analysis (SPA) and differential power analysis (DPA). In differential power analysis, the threat actor studies the power analysis and is able to apply mathematical and statistical principles to determine the intermediate values.
EXF-0002.02 Electromagnetic Leakage Attacks Threat actors can leverage electromagnetic emanations to obtain sensitive information. The electromagnetic radiations attain importance when they are hardware generated emissions, especially emissions from the cryptographic module. Electromagnetic leakage attacks have been shown to be more successful than power analysis attacks on chicards. If proper protections are not in place on the spacecraft, the circuitry is exposed and hence leads to stronger emanations of EM radiations. If the circuitry is exposed, it provides an easier environment to study the electromagnetic emanations from each individual component.
EXF-0002.03 Traffic Analysis Attacks In a terrestrial environment, threat actors use traffic analysis attacks to analyze traffic flow to gather topological information. This traffic flow can divulge information about critical nodes, such as the aggregator node in a sensor network. In the space environment, specifically with relays and constellations, traffic analysis can be used to understand the energy capacity of spacecraft node and the fact that the transceiver component of a spacecraft node consumes the most power. The spacecraft nodes in a constellation network limit the use of the transceiver to transmit or receive information either at a regulated time interval or only when an event has been detected. This generally results in an architecture comprising some aggregator spacecraft nodes within a constellation network. These spacecraft aggregator nodes are the sensor nodes whose primary purpose is to relay transmissions from nodes toward the ground station in an efficient manner, instead of monitoring events like a normal node. The added functionality of acting as a hub for information gathering and preprocessing before relaying makes aggregator nodes an attractive target to side channel attacks. A possible side channel attack could be as simple as monitoring the occurrences and duration of computing activities at an aggregator node. If a node is frequently in active states (instead of idle states), there is high probability that the node is an aggregator node and also there is a high probability that the communication with the node is valid. Such leakage of information is highly undesirable because the leaked information could be strategically used by threat actors in the accumulation phase of an attack.
EXF-0002.04 Timing Attacks Threat actors can leverage timing attacks to exfiltrate information due to variances in the execution timing for different sub-systems in the spacecraft (i.e., cryptosystem). In spacecraft, due to the utilization of processors with lower processing powers (i.e. slow), this becomes all the more important because slower processors will enhance even small difference in computation time. Every operation in a spacecraft takes time to execute, and the time can differ based on the input; with precise measurements of the time for each operation, a threat actor can work backwards to the input. Finding secrets through timing information may be significantly easier than using cryptanalysis of known plaintext, ciphertext pairs. Sometimes timing information is combined with cryptanalysis to increase the rate of information leakage.
EXF-0002.05 Thermal Imaging attacks Threat actors can leverage thermal imaging attacks (e.g., infrared images) to measure heat that is emitted as a means to exfiltrate information from spacecraft processors. Thermal attacks rely on temperature profiling using sensors to extract critical information from the chip(s). The availability of highly sensitive thermal sensors, infrared cameras, and techniques to calculate power consumption from temperature distribution [7] has enhanced the effectiveness of these attacks. As a result, side-channel attacks can be performed by using temperature data without measuring power pins of the chip.
EXF-0003 Eavesdropping Threat actors may seek to capture network communications throughout the ground station and communication channel (i.e. radio frequency, optical) used for uplink and downlink communications
EXF-0003.01 Uplink Intercept Threat actors may target the uplink connection from the victim ground infrastructure to the target spacecraft in order to exfiltrate commanding data. Depending on the implementation (i.e., encryption) the captured uplink data can be used to further other attacks like command link intrusion, replay, etc.
EXF-0003.02 Downlink Intercept Threat actors may target the downlink connection from the victim spacecraft in order to exfiltrate telemetry or payload data. This data can include health information of the spacecraft or mission data that is being collected/analyzed on the spacecraft. Downlinked data can even include mirrored command sessions which can be used for future campaigns or to help perpetuate other techniques.
EXF-0005 Proximity Operations Threat actors may leverage the lack of emission security or tempest controls to exfiltrate information using a visiting spacecraft. This is similar to side-channel attacks but leveraging a visiting spacecraft to measure the signals for decoding purposes.
IMP-0006 Theft Threat actors may attempt to steal the data that is being gathered, processed, and sent from the victim spacecraft. Many spacecraft have a particular purpose associated with them and the data they gather is deemed mission critical. By attempting to steal this data, the mission, or purpose, of the spacecraft could be lost entirely.

Related SPARTA Countermeasures

ID Name Description NIST Rev5 D3FEND ISO 27001
CM0000 Countermeasure Not Identified This technique is a result of utilizing TTPs to create an impact and the applicable countermeasures are associated with the TTPs leveraged to achieve the impact None None None
CM0001 Protect Sensitive Information Organizations should look to identify and properly classify mission sensitive design/operations information (e.g., fault management approach) and apply access control accordingly. Any location (ground system, contractor networks, etc.) storing design information needs to ensure design info is protected from exposure, exfiltration, etc. Space system sensitive information may be classified as Controlled Unclassified Information (CUI) or Company Proprietary. Space system sensitive information can typically include a wide range of candidate material: the functional and performance specifications, any ICDs (like radio frequency, ground-to-space, etc.), command and telemetry databases, scripts, simulation and rehearsal results/reports, descriptions of uplink protection including any disabling/bypass features, failure/anomaly resolution, and any other sensitive information related to architecture, software, and flight/ground /mission operations. This could all need protection at the appropriate level (e.g., unclassified, CUI, proprietary, classified, etc.) to mitigate levels of cyber intrusions that may be conducted against the project’s networks. Stand-alone systems and/or separate database encryption may be needed with controlled access and on-going Configuration Management to ensure changes in command procedures and critical database areas are tracked, controlled, and fully tested to avoid loss of science or the entire mission. Sensitive documentation should only be accessed by personnel with defined roles and a need to know. Well established access controls (roles, encryption at rest and transit, etc.) and data loss prevention (DLP) technology are key countermeasures. The DLP should be configured for the specific data types in question. AC-3(11) AC-4(23) AC-4(25) AC-4(6) CA-3 CM-12 CM-12(1) PL-8 PL-8(1) PM-11 PM-17 SA-3 SA-3(1) SA-3(2) SA-4(12) SA-5 SA-8 SA-9(7) SC-16 SC-8(1) SC-8(3) SI-21 SI-23 SR-12 SR-7 D3-AI D3-AVE D3-NVA D3-CH D3-CBAN D3-CTS D3-PA D3-FAPA D3-SAOR A.8.4 A.8.11 A.8.10 A.5.14 A.8.21 A.5.8 A.5.2 A.5.8 A.8.25 A.8.31 A.8.33 7.5.1 7.5.2 7.5.3 A.5.37 A.8.27 A.8.28 A.5.33 A.8.10 A.5.22
CM0022 Criticality Analysis Conduct a criticality analysis to identify mission critical functions, critical components, and data flows and reduce the vulnerability of such functions and components through secure system design. Focus supply chain protection on the most critical components/functions. Leverage other countermeasures like segmentation and least privilege to protect the critical components. CP-2 CP-2(8) PL-8 PL-8(1) PM-11 PM-17 PM-30 PM-30(1) PM-32 RA-3 RA-3(1) RA-9 RA-9 SA-11 SA-15(3) SA-2 SA-3 SA-4(5) SA-4(9) SA-8 SA-8(3) SC-32(1) SC-7(29) SR-1 SR-1 SR-2 SR-2(1) SR-3 SR-3(2) SR-3(3) SR-5(1) SR-7 D3-AVE D3-OSM D3-IDA D3-SJA D3-AI D3-DI D3-SWI D3-NNI D3-HCI D3-NM D3-PLM D3-AM D3-SYSM D3-SVCDM D3-SYSDM D3-SYSVA D3-OAM D3-ORA 7.5.1 7.5.2 7.5.3 A.5.2 A.5.29 A.8.1 A.5.30 A.5.8 4.4 6.2 7.5.1 7.5.2 7.5.3 10.2 6.1.2 8.2 9.3.2 A.8.8 A.5.22 A.5.2 A.5.8 A.8.25 A.8.31 A.8.27 A.8.28 A.8.29 A.8.30 5.2 5.3 7.5.1 7.5.2 7.5.3 A.5.1 A.5.2 A.5.4 A.5.19 A.5.31 A.5.36 A.5.37 A.5.19 A.5.20 A.5.21 A.8.30 A.5.20 A.5.21 A.5.22
CM0077 Space Domain Awareness The credibility and effectiveness of many other types of defenses are enabled or enhanced by the ability to quickly detect, characterize, and attribute attacks against space systems. Space domain awareness (SDA) includes identifying and tracking space objects, predicting where objects will be in the future, monitoring the space environment and space weather, and characterizing the capabilities of space objects and how they are being used. Exquisite SDA—information that is more timely, precise, and comprehensive than what is publicly available—can help distinguish between accidental and intentional actions in space. SDA systems include terrestrial-based optical, infrared, and radar systems as well as space-based sensors, such as the U.S. military’s Geosynchronous Space Situational Awareness Program (GSSAP) inspector satellites. Many nations have SDA systems with various levels of capability, and an increasing number of private companies (and amateur space trackers) are developing their own space surveillance systems, making the space environment more transparent to all users.* * CP-13 CP-2(3) CP-2(5) CP-2(7) PE-20 PE-6 SI-4(17) D3-APLM D3-PM D3-HCI D3-SYSM A.5.29 A.7.4 A.8.16 A.5.10
CM0079 Maneuverability Satellite maneuver is an operational tactic that can be used by satellites fitted with chemical thrusters to avoid kinetic and some directed energy ASAT weapons. For unguided projectiles, a satellite can be commanded to move out of their trajectory to avoid impact. If the threat is a guided projectile, like most direct-ascent ASAT and co-orbital ASAT weapons, maneuver becomes more difficult and is only likely to be effective if the satellite can move beyond the view of the onboard sensors on the guided warhead.* * CP-10(6) CP-13 CP-2 CP-2(1) CP-2(3) CP-2(5) PE-20 PE-21 None 7.5.1 7.5.2 7.5.3 A.5.2 A.5.29 A.8.1 A.5.30 A.5.29 A.5.10
CM0080 Stealth Technology Space systems can be operated and designed in ways that make them difficult to detect and track. Similar to platforms in other domains, stealthy satellites can use a smaller size, radar-absorbing coatings, radar-deflecting shapes, radar jamming and spoofing, unexpected or optimized maneuvers, and careful control of reflected radar, optical, and infrared energy to make themselves more difficult to detect and track. For example, academic research has shown that routine spacecraft maneuvers can be optimized to avoid detection by known sensors.* * CP-10(6) CP-13 SC-30 SC-30(5) D3-PH A.5.29
CM0081 Defensive Jamming and Spoofing A jammer or spoofer can be used to disrupt sensors on an incoming kinetic ASAT weapon so that it cannot steer itself effectively in the terminal phase of flight. When used in conjunction with maneuver, this could allow a satellite to effectively “dodge” a kinetic attack. Similar systems could also be used to deceive SDA sensors by altering the reflected radar signal to change the location, velocity, and number of satellites detected, much like digital radio frequency memory (DRFM) jammers used on many military aircraft today. A spacebased jammer can also be used to disrupt an adversary’s ability to communicate.* * with an ASAT weapon. CP-10(6) CP-13 CP-2 CP-2(1) CP-2(5) CP-2(7) PE-20 D3-DO 7.5.1 7.5.2 7.5.3 A.5.2 A.5.29 A.8.1 A.5.30 A.5.29 A.5.10
CM0082 Deception and Decoys Deception can be used to conceal or mislead others on the “location, capability, operational status, mission type, and/or robustness” of a satellite. Public messaging, such as launch announcements, can limit information or actively spread disinformation about the capabilities of a satellite, and satellites can be operated in ways that conceal some of their capabilities. Another form of deception could be changing the capabilities or payloads on satellites while in orbit. Satellites with swappable payload modules could have on-orbit servicing vehicles that periodically move payloads from one satellite to another, further complicating the targeting calculus for an adversary because they may not be sure which type of payload is currently on which satellite. Satellites can also use tactical decoys to confuse the sensors on ASAT weapons and SDA systems. A satellite decoy can consist of an inflatable device designed to mimic the size and radar signature of a satellite, and multiple decoys can be stored on the satellite for deployment when needed. Electromagnetic decoys can also be used in space that mimic the RF signature of a satellite, similar to aircraft that use airborne decoys, such as the ADM-160 Miniature Air-launched Decoy (MALD).* * SC-26 SC-30 D3-DE D3-CHN D3-SHN D3-IHN D3-DO D3-DF D3-DNR D3-DP D3-DPR D3-DST D3-DUC None
CM0083 Antenna Nulling and Adaptive Filtering Satellites can be designed with antennas that “null” or minimize signals from a particular geographic region on the surface of the Earth or locations in space where jamming is detected. Nulling is useful when jamming is from a limited number of detectable locations, but one of the downsides is that it can also block transmissions from friendly users that fall within the nulled area. If a jammer is sufficiently close to friendly forces, the nulling antenna may not be able to block the jammer without also blocking legitimate users. Adaptive filtering, in contrast, is used to block specific frequency bands regardless of where these transmissions originate. Adaptive filtering is useful when jamming is consistently within a particular range of frequencies because these frequencies can be filtered out of the signal received on the satellite while transmissions can continue around them. However, a wideband jammer could interfere with a large enough portion of the spectrum being used that filtering out the jammed frequencies would degrade overall system performance. * * SC-40 SI-4(14) D3-PH None
CM0084 Physical Seizure A space vehicle capable of docking with, manipulating, or maneuvering other satellites or pieces of debris can be used to thwart spacebased attacks or mitigate the effects after an attack has occurred. Such a system could be used to physically seize a threatening satellite that is being used to attack or endanger other satellites or to capture a satellite that has been disabled or hijacked for nefarious purposes. Such a system could also be used to collect and dispose of harmful orbital debris resulting from an attack. A key limitation of a physical seizure system is that each satellite would be time- and propellant-limited depending on the orbit in which it is stored. A system stored in GEO, for example, would not be well positioned to capture an object in LEO because of the amount of propellant required to maneuver into position. Physical seizure satellites may need to be stored on Earth and deployed once they are needed to a specific orbit to counter a specific threat.* * CP-13 PE-20 D3-AM A.5.29 A.5.10
CM0085 Electromagnetic Shielding Satellite components can be vulnerable to the effects of background radiation in the space environment and deliberate attacks from HPM and electromagnetic pulse weapons. The effects can include data corruption on memory chips, processor resets, and short circuits that permanently damage components.* * CP-13 PE-18 PE-19 PE-21 D3-PH D3-RFS A.5.29 A.5.10 A.7.5 A.7.8 A.7.5 A.7.8 A.8.12
CM0086 Filtering and Shuttering Filters and shutters can be used on remote sensing satellites to protect sensors from laser dazzling and blinding. Filters can protect sensors by only allowing light of certain wavelengths to reach the sensors. Filters are not very effective against lasers operating at the same wavelengths of light the sensors are designed to detect because a filter that blocks these wavelengths would also block the sensor from its intended mission. A shutter acts by quickly blocking or diverting all light to a sensor once an anomaly is detected or a threshold is reached, which can limit damage but also temporarily interrupts the collection of data.* * CP-13 PE-18 SC-5 SC-5(3) D3-PH A.5.29 A.5.10 A.7.5 A.7.8
CM0087 Defensive Dazzling/Blinding Laser systems can be used to dazzle or blind the optical or infrared sensors on an incoming ASAT weapon in the terminal phase of flight. This is similar to the laser infrared countermeasures used on aircraft to defeat heat-seeking missiles. Blinding an ASAT weapon’s guidance system and then maneuvering to a new position (if necessary) could allow a satellite to effectively “dodge” a kinetic attack. It could also be used to dazzle or blind the optical sensors on inspector satellites to prevent them from imaging a satellite that wants to keep its capabilities concealed or to frustrate adversary SDA efforts.* * CP-10(6) CP-13 CP-2 CP-2(1) CP-2(5) CP-2(7) PE-20 None 7.5.1 7.5.2 7.5.3 A.5.2 A.5.29 A.8.1 A.5.30 A.5.29 A.5.10
CM0002 COMSEC A component of cybersecurity to deny unauthorized persons information derived from telecommunications and to ensure the authenticity of such telecommunications. COMSEC includes cryptographic security, transmission security, emissions security, and physical security of COMSEC material. It is imperative to utilize secure communication protocols with strong cryptographic mechanisms to prevent unauthorized disclosure of, and detect changes to, information during transmission. Systems should also maintain the confidentiality and integrity of information during preparation for transmission and during reception. Spacecraft should not employ a mode of operations where cryptography on the TT&C link can be disabled (i.e., crypto-bypass mode). The cryptographic mechanisms should identify and reject wireless transmissions that are deliberate attempts to achieve imitative or manipulative communications deception based on signal parameters. AC-17 AC-17(1) AC-17(10) AC-17(10) AC-17(2) AC-18 AC-18(1) AC-2(11) AC-3(10) CA-3 IA-4(9) IA-5 IA-5(7) IA-7 PL-8 PL-8(1) SA-8(18) SA-9(6) SC-10 SC-12 SC-12(1) SC-12(2) SC-12(3) SC-12(6) SC-13 SC-16(3) SC-28(1) SC-28(3) SC-7 SC-7(10) SC-7(11) SC-7(18) SC-7(5) SC-8(1) SC-8(3) SI-10 SI-10(3) SI-10(5) SI-10(6) SI-19(4) SI-3(8) D3-ET D3-MH D3-MAN D3-MENCR D3-NTF D3-ITF D3-OTF D3-CH D3-DTP D3-NTA D3-CAA D3-DNSTA D3-IPCTA D3-NTCD D3-RTSD D3-PHDURA D3-PMAD D3-CSPP D3-MA D3-SMRA D3-SRA A.5.14 A.6.7 A.8.1 A.8.16 A.5.14 A.8.1 A.8.20 A.5.14 A.8.21 A.5.16 A.5.17 A.5.8 A.5.14 A.8.16 A.8.20 A.8.22 A.8.23 A.8.26 A.8.12 A.5.33 A.8.20 A.8.24 A.8.24 A.8.26 A.5.31 A.5.33 A.8.11
CM0030 Crypto Key Management Leverage best practices for crypto key management as defined by organization like NIST or the National Security Agency. Leverage only approved cryptographic algorithms, cryptographic key generation algorithms or key distribution techniques, authentication techniques, or evaluation criteria. Encryption key handling should be performed outside of the onboard software and protected using cryptography. Encryption keys should be restricted so that they cannot be read via any telecommands. PL-8 PL-8(1) SA-3 SA-4(5) SA-8 SA-9(6) SC-12 SC-12(1) SC-12(2) SC-12(3) SC-12(6) SC-28(3) SC-8(1) D3-CH D3-CP A.5.8 A.5.2 A.5.8 A.8.25 A.8.31 A.8.27 A.8.28 A.5.33 A.8.24
CM0031 Authentication Authenticate all communication sessions (crosslink and ground stations) for all commands before establishing remote connections using bidirectional authentication that is cryptographically based. Adding authentication on the spacecraft bus and communications on-board the spacecraft is also recommended. AC-14 AC-17 AC-17(10) AC-17(10) AC-17(2) AC-18 AC-18(1) IA-2 IA-3(1) IA-4 IA-4(9) IA-7 PL-8 PL-8(1) SA-3 SA-4(5) SA-8 SA-8(15) SA-8(9) SC-16 SC-16(2) SC-32(1) SC-7(11) SC-8(1) SI-14(3) D3-MH D3-MAN D3-CH D3-BAN D3-MFA D3-TAAN D3-CBAN A.5.14 A.6.7 A.8.1 A.5.14 A.8.1 A.8.20 A.5.16 A.5.16 A.5.8 A.5.2 A.5.8 A.8.25 A.8.31 A.8.27 A.8.28 A.5.33
CM0033 Relay Protection Implement relay and replay-resistant authentication mechanisms for establishing a remote connection or connections on the spacecraft bus. AC-17(10) AC-17(10) IA-2(8) IA-3 IA-3(1) IA-4 IA-7 SC-13 SC-23 SC-7 SC-7(11) SC-7(18) SI-10 SI-10(5) SI-10(6) SI-3(8) D3-ITF D3-NTA D3-OTF A.5.16 A.5.14 A.8.16 A.8.20 A.8.22 A.8.23 A.8.26 A.8.24 A.8.26 A.5.31
CM0073 Traffic Flow Analysis Defense Utilizing techniques to assure traffic flow security and confidentiality to mitigate or defeat traffic analysis attacks or reduce the value of any indicators or adversary inferences. This may be a subset of COMSEC protections, but the techniques would be applied where required to links that carry TT&C and/or data transmissions (to include on-board the spacecraft) where applicable given value and attacker capability. Techniques may include but are not limited to methods to pad or otherwise obfuscate traffic volumes/duration and/or periodicity, concealment of routing information and/or endpoints, or methods to frustrate statistical analysis. SC-8 SI-4(15) D3-NTA D3-ANAA D3-RPA D3-NTCD A.5.10 A.5.14 A.8.20 A.8.26
CM0003 TEMPEST The spacecraft should protect system components, associated data communications, and communication buses in accordance with TEMPEST controls to prevent side channel / proximity attacks. Encompass the spacecraft critical components with a casing/shielding so as to prevent access to the individual critical components. PE-19 PE-19(1) PE-21 SC-8(3) D3-PH D3-RFS A.7.5 A.7.8 A.8.12
CM0040 Shared Resource Leakage Prevent unauthorized and unintended information transfer via shared system resources. Ensure that processes reusing a shared system resource (e.g., registers, main memory, secondary storage) do not have access to information (including encrypted representations of information) previously stored in that resource during a prior use by a process after formal release of that resource back to the system or reuse AC-4(23) AC-4(25) SC-2(2) SC-32(1) SC-4 SC-49 SC-50 SC-7(29) D3-MAC D3-PAN D3-HBPI A.8.11 A.8.10
CM0050 On-board Message Encryption In addition to authentication on-board the spacecraft bus, encryption is also recommended to protect the confidentiality of the data traversing the bus. AC-4 AC-4(23) AC-4(24) AC-4(26) AC-4(31) AC-4(32) PL-8 PL-8(1) SA-3 SA-8 SA-8(18) SA-8(9) SA-9(6) SC-13 SC-16 SC-16(2) SC-16(3) SC-8(1) SC-8(3) SI-19(4) SI-4(10) SI-4(25) D3-MH D3-MENCR D3-ET A.5.14 A.8.22 A.8.23 A.8.11 A.5.8 A.5.2 A.5.8 A.8.25 A.8.31 A.8.27 A.8.28 A.5.33 A.8.24 A.8.26 A.5.31 A.8.11
CM0036 Session Termination Terminate the connection associated with a communications session at the end of the session or after an acceptable amount of inactivity which is established via the concept of operations. AC-12 SC-10 SI-14(3) D3-SDA A.8.20
CM0039 Least Privilege Employ the principle of least privilege, allowing only authorized processes which are necessary to accomplish assigned tasks in accordance with system functions. Ideally maintain a separate execution domain for each executing process. AC-2 AC-3(13) AC-3(15) AC-4(2) AC-6 CA-3(6) CM-7 CM-7(5) CM-7(8) PL-8 PL-8(1) SA-17(7) SA-3 SA-4(9) SA-8 SA-8(13) SA-8(14) SA-8(15) SA-8(3) SA-8(4) SA-8(9) SC-2(2) SC-32(1) SC-49 SC-50 SC-7(29) D3-MAC D3-EI D3-HBPI D3-KBPI D3-PSEP D3-MBT D3-PCSV D3-LFP D3-UBA A.5.16 A.5.18 A.8.2 A.5.15 A.8.2 A.8.18 A.8.19 A.8.19 A.5.8 A.5.2 A.5.8 A.8.25 A.8.31 A.8.27 A.8.28
CM0055 Secure Command Mode(s) Provide additional protection modes for commanding the spacecraft. These can be where the spacecraft will restrict command lock based on geographic location of ground stations, special operational modes within the flight software, or even temporal controls where the spacecraft will only accept commands during certain times. AC-17(1) AC-17(10) AC-2(11) AC-2(12) AC-3 AC-3(2) AC-3(3) AC-3(4) AC-3(8) CA-3(7) PL-8 PL-8(1) SA-3 SA-8 SC-7 SI-3(8) D3-AH D3-ACH D3-MFA D3-OTP A.8.16 A.5.15 A.5.33 A.8.3 A.8.4 A.8.18 A.8.20 A.8.2 A.8.16 A.5.8 A.5.2 A.5.8 A.8.25 A.8.31 A.8.27 A.8.28 A.5.14 A.8.16 A.8.20 A.8.22 A.8.23 A.8.26
CM0062 Dummy Process - Aggregator Node According to Securing Sensor Nodes Against Side Channel Attacks, it is practically inefficient to prevent adversaries from identifying aggregator nodes in a network (i.e., constellation) because camouflaging traffic in sensor networks is power intensive. Consequently, focus on preventing adversaries from identifying valid aggregation cycles of aggregator nodes. One solution to counter such attacks is to have each aggregator node execute dummy operations that resemble the average power consumption curve observed during the normal operation of the aggregator node. Apart from simulating the power consumption of a genuine process execution, the two necessities that the execution of the dummy process must incorporate to be successful in thwarting the accumulation phase are to use a different dummy execution process each time or have a low repetition rate. This should help prevent the attacker from finding a pattern that would differentiate the execution of a dummy process from the normal execution of an aggregator node. The second requirement relates to the timing of the execution of the dummy process. Depending on whether there is a pattern to the timing of the execution of a dummy process, a threat actor may be able to identify and disregard the dummy process. For example, if a threat actor is capable of identifying the presence or absence of a radio frequency transmission, the attacker can disregard any power consumption curve computed during the absence of transmission signal. Similarly, if the dummy process is not executed every time the aggregator node receives a transmission, the attacker will be able to identify invalid transmission. Hence, to ensure the effectiveness of this scheme, the dummy process must be executed each time the aggregator receives a transmission as well as randomly during idle periods. The advantage of incorporating dummy processes in an aggregator is to minimize the ease of identifying transmission flow in a sensor network that can be used to identify the base station of the sensor network, which could be highly confidential in critical applications. PE-19 PE-19(1) D3-DE D3-CHN D3-SHN D3-IHN D3-DO D3-DNR A.7.5 A.7.8 A.8.12
CM0005 Ground-based Countermeasures This countermeasure is focused on the protection of terrestrial assets like ground networks and development environments/contractor networks, etc. Traditional detection technologies and capabilities would be applicable here. Utilizing resources from NIST CSF to properly secure these environments using identify, protect, detect, recover, and respond is likely warranted. Additionally, NISTIR 8401 may provide resources as well since it was developed to focus on ground-based security for space systems ( Furthermore, the MITRE ATT&CK framework provides IT focused TTPs and their mitigations Several recommended NIST 800-53 Rev5 controls are provided for reference when designing ground systems/networks. AC-1 AC-10 AC-11 AC-11(1) AC-12 AC-12(1) AC-14 AC-16 AC-16(6) AC-17 AC-17 AC-17(1) AC-17(10) AC-17(2) AC-17(3) AC-17(4) AC-17(6) AC-17(9) AC-18 AC-18 AC-18(1) AC-18(3) AC-18(4) AC-18(5) AC-19 AC-19(5) AC-2 AC-2 AC-2(1) AC-2(11) AC-2(12) AC-2(13) AC-2(2) AC-2(3) AC-2(4) AC-2(9) AC-20 AC-20(1) AC-20(2) AC-20(3) AC-20(5) AC-21 AC-22 AC-3 AC-3(11) AC-3(13) AC-3(15) AC-3(4) AC-4 AC-4(23) AC-4(24) AC-4(25) AC-4(26) AC-4(31) AC-4(32) AC-6 AC-6(1) AC-6(10) AC-6(2) AC-6(3) AC-6(5) AC-6(8) AC-6(9) AC-7 AC-8 AT-2(4) AT-2(4) AT-2(5) AT-2(6) AT-3 AT-3(2) AT-4 AU-10 AU-11 AU-12 AU-12(1) AU-12(3) AU-14 AU-14(1) AU-14(3) AU-2 AU-3 AU-3(1) AU-4 AU-4(1) AU-5 AU-5(1) AU-5(2) AU-5(5) AU-6 AU-6(1) AU-6(3) AU-6(4) AU-6(5) AU-6(6) AU-7 AU-7(1) AU-8 AU-9 AU-9(2) AU-9(3) AU-9(4) CA-3 CA-3 CA-3(6) CA-3(7) CA-7 CA-7(1) CA-7(6) CA-8 CA-9 CM-10(1) CM-11 CM-11 CM-11(2) CM-11(3) CM-12 CM-12(1) CM-14 CM-2 CM-2(2) CM-2(3) CM-2(7) CM-3 CM-3(1) CM-3(2) CM-3(5) CM-3(7) CM-3(7) CM-3(8) CM-4 CM-5(1) CM-5(5) CM-6 CM-6(1) CM-6(2) CM-7 CM-7(1) CM-7(2) CM-7(3) CM-7(5) CM-7(8) CM-7(8) CM-7(9) CM-8 CM-8(1) CM-8(2) CM-8(3) CM-8(4) CM-9 CP-10 CP-10(2) CP-10(4) CP-2 CP-2 CP-2(2) CP-2(5) CP-2(8) CP-3(1) CP-4(5) CP-8 CP-8(1) CP-8(2) CP-8(3) CP-8(4) CP-8(5) CP-9 CP-9(1) CP-9(2) CP-9(3) IA-11 IA-12 IA-12(1) IA-12(2) IA-12(3) IA-12(4) IA-12(5) IA-12(6) IA-2 IA-2(1) IA-2(12) IA-2(2) IA-2(5) IA-2(6) IA-2(8) IA-3 IA-3(1) IA-4 IA-4(9) IA-5 IA-5(1) IA-5(13) IA-5(14) IA-5(2) IA-5(7) IA-5(8) IA-6 IA-7 IA-8 IR-2 IR-2(2) IR-2(3) IR-3(3) IR-4 IR-4(1) IR-4(11) IR-4(11) IR-4(12) IR-4(13) IR-4(14) IR-4(3) IR-4(4) IR-4(5) IR-4(6) IR-4(7) IR-4(8) IR-5 IR-5(1) IR-6 IR-6(1) IR-7 IR-7(1) MA-2 MA-3 MA-3(1) MA-3(2) MA-3(3) MA-4 MA-4(1) MA-4(3) MA-4(6) MA-4(7) MA-5(1) MA-6 MA-7 MP-2 MP-3 MP-4 MP-5 MP-6 MP-6(3) MP-7 PE-3(7) PL-10 PL-11 PL-8 PL-8(1) PL-8(2) PL-9 PL-9 PM-11 PM-16(1) PM-17 PM-30 PM-30(1) PM-31 PM-32 RA-10 RA-3(1) RA-3(2) RA-3(2) RA-3(3) RA-3(4) RA-5 RA-5(10) RA-5(11) RA-5(2) RA-5(4) RA-5(5) RA-7 RA-9 RA-9 SA-10 SA-10(1) SA-10(7) SA-11 SA-11 SA-11(2) SA-11(4) SA-11(7) SA-11(9) SA-15 SA-15(3) SA-15(7) SA-17 SA-17 SA-2 SA-2 SA-22 SA-3 SA-3 SA-3(1) SA-3(2) SA-3(2) SA-4 SA-4 SA-4(1) SA-4(10) SA-4(12) SA-4(2) SA-4(3) SA-4(3) SA-4(5) SA-4(5) SA-4(7) SA-4(9) SA-4(9) SA-5 SA-8 SA-8 SA-8(14) SA-8(15) SA-8(18) SA-8(21) SA-8(22) SA-8(23) SA-8(24) SA-8(9) SA-9 SA-9 SA-9(1) SA-9(2) SA-9(6) SA-9(7) SC-10 SC-12 SC-12(1) SC-12(6) SC-13 SC-15 SC-16(2) SC-16(3) SC-18(1) SC-18(2) SC-18(3) SC-18(4) SC-2 SC-2(2) SC-20 SC-21 SC-22 SC-23 SC-23(1) SC-23(3) SC-23(5) SC-24 SC-28 SC-28(1) SC-28(3) SC-3 SC-38 SC-39 SC-4 SC-45 SC-45(1) SC-45(1) SC-45(2) SC-49 SC-5 SC-5(1) SC-5(2) SC-5(3) SC-50 SC-51 SC-7 SC-7(10) SC-7(11) SC-7(12) SC-7(13) SC-7(14) SC-7(18) SC-7(21) SC-7(25) SC-7(29) SC-7(3) SC-7(4) SC-7(5) SC-7(5) SC-7(7) SC-7(8) SC-7(9) SC-8 SC-8(1) SC-8(2) SC-8(5) SI-10 SI-10(3) SI-10(6) SI-11 SI-14(3) SI-16 SI-19(4) SI-2 SI-2(2) SI-2(3) SI-2(6) SI-21 SI-3 SI-3 SI-3(10) SI-4 SI-4(1) SI-4(10) SI-4(11) SI-4(12) SI-4(13) SI-4(14) SI-4(15) SI-4(16) SI-4(17) SI-4(2) SI-4(20) SI-4(22) SI-4(23) SI-4(24) SI-4(25) SI-4(4) SI-4(5) SI-5 SI-5(1) SI-6 SI-7 SI-7(1) SI-7(17) SI-7(2) SI-7(5) SI-7(7) SI-7(8) SR-1 SR-1 SR-10 SR-11 SR-11 SR-11(1) SR-11(2) SR-11(3) SR-12 SR-2 SR-2(1) SR-3 SR-3(1)