A sapling matures: meet sq 1.0

The Sequoia PGP project has announced
version 1.0 of the sq command-line tool for managing OpenPGP
encryption and signatures. It also provides a decentralized public
key infrastructure (PKI), and key management facilities. This is
the first stable release since development began on the project in
2017.

sq's PKI is probably its most notable feature, and the one we invested
the most time in. The PKI is used to authenticate certificates, and
messages. Authentication is necessary to ensure that you are
encrypting to the person you think you are, and to identify who really
authored a message; without authentication, encryption and
verification are much weaker.