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Which PGP standards are supported

E-mail encryption with Guard is 100% compatible with the OpenPGP Standard.

The web interface of allows the sending, receiving, signing, and verification of PGP/MIME- and PGP/Inline-encrypted e-mails. Users of can thus communicate securely with everyone else who uses a PGP-compatible e-mail client or -plugin.

By default a freshly activated Guard creates a RSA 2048 bit key pair . As of December 2020 this is considered sufficiently secure for day-to-day use.
Those who have higher protection requirements, may want to use a ECC Curve25519 PGP pair. This has to be created manually.

Afterwards it has to be imported manually into the