Common
Privacy-Enhanced Mail
Family of file formats associated with RFC 1421
Privacy-Enhanced Mail
Privacy-enhanced mail (PEM) is a de facto file format for storing and sending cryptographic keys, certificates, and other data, based on a set of 1993 IETF standards defining "privacy-enhanced mail". While the original standards were never broadly adopted and were supplanted by PGP and S/MIME, the textual encoding they defined became very popular. The PEM format was eventually formalized by the IETF in RFC 7468.
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