Optimizing OpenSSL's AES-CFB128 with Vector AES: Performance Gains and Hard-Won Lessons
Cryptographic implementations demand both correctness and security but how do you optimize an algorithm like AES-CFB128 for modern CPUs? This case study explores the evolution of OpenSSL’s AES-CFB128 implementation, from a sequential AES-NI baseline to a high-performance VAES-optimized version (openssl#26902).
We’ll deep dive into:
- SIMD and compiler optimization techniques,
- performance measurement and characterization,
- tooling and debugging challenges,
- security considerations,
- lessons learned as an external contributor
Technical Deep Dive & Innovation
Belvedere II/ Community, Contribution & the Future
