There are a number of projects under the Sequoia umbrella, or a somehow associated with the Sequoia project. Sequoia-PGP sequoia-openpgp OpenPGP data types and associated machinery. This crate aims to provide a complete implementation of OpenPGP as defined by RFC 4880 as well as some extensions (e.g., RFC 6637, which describes ECC cryptography for OpenPGP. There are prototypes of crates providing higher-level interfaces. Take a look at the other crates in the toplevel of the repository.