Recently implemented a Ruby C extension for format preserving encryption/decryption pair for unique code generation. From SHA-* family to AES to Siphash (https:

Recently implemented a Ruby C extension for format preserving encryption/decryption pair for unique code generation. From SHA-* family to AES to Siphash (https://131002.net/siphash/siphash.pdf https://131002.net/siphash/siphash.pdf) the wizardry, hoopla and alchemy going on inside basic crypto building blocks and hashing methods is amazing. The only "reasonable" building block appears to be various Feistel networks. What we're left with is modern cryptanalysis.. Hope the cryptanalysis section of the Siphash home page gets quickly built in. Today's non-security related applications end up making tomorrow's security headline.