Side-Channel Attack

An attack that exploits information gained from the physical implementation of a system.

Understanding:

A side-channel attack exploits unintended information leaks from a system, such as power consumption, electromagnetic emissions, timing variations, or sound to extract sensitive data like encryption keys.

Common Applications and Use Cases:

Timing Attacks on Cryptographic Algorithms – Extracts private keys from RSA, AES.
Electromagnetic (TEMPEST) Attacks – Monitors emissions to steal information.
Cache-Based Attacks (e.g., Spectre, Meltdown) – Exploits CPU cache behavior.

Best Practices and Security Considerations:

Implement Constant-Time Cryptographic Algorithms – Prevents timing attacks.
Use Shielding Techniques (Faraday Cage, Power Filtering) – Reduces electromagnetic leaks.
Monitor for Unusual Behavior – Detects attack attempts.