Open PGP

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Open PGP is an IETF standard for the PGP email encryption system. The current version, as of late 2008, is RFC 4880 [1], Earlier versions were RFC 1991 and RFC 2440.

Supported public key algorithms are RSA, El Gamal (encrypt-only, not for signatures), and Digital Signature Algorithm. Supported block ciphers are IDEA, Triple DES, CAST-128, AES and Twofish.

Both the current commercial release [1] of PGP and the open source product GNU Privacy Guard (GPG) are based on this specification.

References

  1. ↑ J. Callas, L. Donnerhacke, H. Finney, D. Shaw and R. Thayer (November 2007). OpenPGP Message Format.
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