Go crypto: bridging the performance gap

The text discusses how CloudFlare uses the programming language Go extensively and has developed assembly implementations of Elliptic Curves and AES-GCM for improved cryptographic performance on amd64 architecture. These improvements bring the performance up to par with OpenSSL, which is used by CloudFlare for Universal SSL. The fork includes constant-time and side-channel protected implementations, as well as small improvements to Go's RSA implementation. AES-GCM is an Authenticated Encryption with Associated Data (AEAD) that combines a cipher and a MAC algorithm into a single robust algorithm using a single key. By supporting the two state-of-the-art AEADs - AES-GCM and ChaCha20-Poly1305, together with ECDSA and ECDH algorithms, CloudFlare can provide the fastest, most flexible, and most secure TLS experience possible on all platforms.