Acronym · Safety & Security
SPA (Simple Power Analysis)
Reading secrets directly from the shape of one or a few power traces, exploiting operations whose duration or amplitude depends on key bits, such as the square-and-multiply pattern of a naive RSA exponentiation.
- Type
- Acronym
- Domain
- Safety & Security, Hardware attacks
Notes
Defeated by constant-time, key-independent control flow, which is why crypto libraries forbid secret-dependent branches.
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