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Part 1: The life of an optimization barrier
blog.trailofbits.com | blog | #rust | #cryptography | #llvm | #constant-time | #side-channels | #webassembly
Summary
Constant-time Rust cryptography can be broken by optimization. Compiling to WebAssembly means code passes through two optimizers, and LLVM itself may introduce a new timing side-channel.
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