IETF RFC 4648
The Base16, Base32, and Base64 Data Encodings
|Publication Date:||1 October 2006|
This document describes the commonly used base 64, base 32, and base 16 encoding schemes. It also discusses the use of line-feeds in encoded data, use of padding in encoded data, use of non-alphabet characters in encoded data, use of different encoding alphabets, and canonical encodings.