Power Randomization

Power randomization is a technique in which a hardware module is built into the chip that adds noise to the power consumption. This countermeasure is simple and easy to implement but is not energy efficient and could be impactful for size, weight, and power which is limited on spacecraft as it adds to the fabrication cost of the device.


  • J. Daemen and V. Rijmen. Resistance against implementation attacks: A comparative study of the ales proposals. In The Second AES Candidate Conference, pages 122–132, Gaithersburg, MD, 1999. National Institute of Standards and Technology.

Best Segment for Countermeasure Deployment

  • Space Segment

NIST Rev5 Controls

D3FEND Techniques

D3FEND Artifacts


ISO 27001

ID: CM0058
NASA Best Practice Guide:  MI-AUTH-01 | MI-AUTH-02 | MI-INTG-01 | MI-DCO-02
ESA Space Shield Mitigation: 
Created: 2022/10/19
Last Modified: 2023/10/17

Techniques Addressed by Countermeasure

ID Name Description
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.
.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.

Space Threats Addressed by Countermeasure

ID Description
SV-CF-2 Eavesdropping (RF and proximity)  
SV-AC-5 Proximity operations (i.e., grappling satellite)