https://datatracker.ietf.org/doc/html/rfc3447
RFC 3447 - Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.1
Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.1 (RFC 3447, ; obsoleted by RFC 8017)
rfc 3447public keyversion 2cryptographystandards