Editing Base64 (section)

===OpenPGP===
{{further|Pretty Good Privacy#OpenPGP}}
[[OpenPGP]], described in {{IETF RFC|9580}}, specifies "[[ASCII armor]]", which is identical to the "Base64" encoding described by MIME, with the addition of an optional 24-bit [[cyclic redundancy check|CRC]]. The [[checksum]] is calculated on the input data before encoding; the checksum is then encoded with the same Base64 algorithm and, prefixed by the "<code>=</code>" symbol as the separator, appended to the encoded output data.<ref>{{cite IETF |title=OpenPGP Message Format |rfc=9580 |date=July 2024 |publisher=[[Internet Engineering Task Force|IETF]] |access-date=February 13, 2025}}</ref>