Ed25519: high-speed high-security signatures. The Ed25519 software is available as the crypto_sign/ed25519 subdirectory of the SUPERCOP benchmarking tool, starting in version 20110629. This software will also be integrated into the next release of the Networking and Cryptography library (NaCl). The Ed25519 software consists of three separate implementations, all providing the same interface: amd64-51-30k. Assembly-language implementation for the amd64 architecture, using radix 2^51 and a 30KB precomputed table. amd64-64-24k. Assembly-language implementation for the amd64 architecture, using radix 2^64 and a 24KB precomputed table. ref. Slow but relatively simple and portable C implementation. Both SUPERCOP and NaCl automatically select the fastest implementation on each computer.