openpgp-notes/book/source/13-armor.md

ASCII Armor

The native format of OpenPGP data is binary.

However, in many use cases it is customary to use OpenPGP data in a non-binary encoding called "ASCII Armor." For example, ASCII Armored OpenPGP data is often used in email, for encrypted messages or for signatures.

OpenPGP's ASCII Armor mechanism consists of:

• A header line
• Headers that can contain additional metadata
• The Base64 encoded OpenPGP data
  • An optional checksum for this data
• A "tail line" (footer) that matches the header line

The Cleartext Signature Framework

:class: warning

Explain/discuss, [link](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-10.html#name-cleartext-signature-framewo)

  - Linebreak normalization?
  - Dash escaping

Advanced topics

CRC (and its deprecation in crypto-refresh)

See https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-10.html#name-optional-checksum