Base32

Base32 is a family of binary-to-text encodings which use an alphabet of 32 symbols. Such encodings usually use ASCII letters and digits, and are case-insensitive.

In particular, it usually refers to the Base32 encoding defined in RFC 4648, which uses the following symbols (along with, for padding): ABCDEFGHIJKLMNOPQRSTUVWXYZ234567

Links

 * Wikipedia: Base32
 * RFC 3548: The Base16, Base32, and Base64 Data Encodings (obsolete)
 * RFC 4648: The Base16, Base32, and Base64 Data Encodings