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Whip the Whisperer: Simulating Side Channel Leakage
"Discover the surprising ways AES engines leak side-channel information, and learn how to identify these weaknesses using gate-level modeling, correlation power analysis, and simulators like Skate to design more secure chips."
- Whip the Whisperer: Simulating Side Channel Leakage
- AES engine leaks in unexpected places, not just the CPU
- Measured leakage in 10 rounds, mostly before AES engine takes over
- CPA (Correlation Power Analysis) used to analyze side-channel leakage
- Masks used to mitigate leakage, but not effective enough
- Gate-level modeling necessary to identify leakage points
- Found leakage in ALUs and registers in the AES engine
- 3 types of leakage: power, EM, and timing
- Masking does not completely eliminate leakage, just shifts it
- Countermeasures need to be designed in from the start, not as an afterthought
- Correlation analysis can identify leakage, even with masking
- Simulators like Skate can help design and test secure chips
- Real-world chips are often not tested for side-channel leakage
- AES masking is not enough to protect against side-channel attacks
- Countermeasures should be designed to be resilient against multiple types of attacks