Registries Considered Harmful

Cryptographic protocols and specifications often come with registries that map numeric or string identifiers to algorithms or suites. Something like this. 1 RSA-PSS-SHA256 2 RSA-PSS-SHA512 3 ECDSA-P256-SHA256 4 ECDSA-P521-SHA512 5 Ed25519 ... Youll find them everywhere. TLS, X.509, SSH, PGP, you...