You @strong{have to} verify downloaded tarballs authenticity to be sure
that you retrieved trusted and untampered software. There are two options:

@table @asis

@item @url{https://www.openpgp.org/, OpenPGP} @file{.asc} signature
    Use @url{https://www.gnupg.org/, GNU Privacy Guard} free software
    implementation.
    For the very first time it is necessary to get signing public key and
    import it. It is provided @url{PUBKEY-PGP.asc, here}, but you should
    check alternate resources.

@verbatim
pub   ed25519/0x5921D596A332F844 2023-08-11
      3477 D329 2C77 5BF3 9DAA  0E07 5921 D596 A332 F844
uid   tofuproxy releases <tofuproxy@stargrave.org>
@end verbatim

@example
$ gpg --auto-key-locate dane --locate-keys tofuproxy at stargrave dot org
$ gpg --auto-key-locate  wkd --locate-keys tofuproxy at stargrave dot org
@end example

@item @url{https://www.openssh.com/, OpenSSH} @file{.sig} signature
    @url{PUBKEY-SSH.pub, Public key} and its OpenPGP
    @url{PUBKEY-SSH.pub.asc, signature} made with the key above.
    Its fingerprint: @code{SHA256:NIDt9iZUizwivY3GoxmGvbQTH7mz/dmV7ZFOXeYfa2o}.

@example
$ ssh-keygen -Y verify -f PUBKEY-SSH.pub -I tofuproxy@@cypherpunks.ru -n file \
    -s tofuproxy-@value{VERSION}.tar.zst.sig < tofuproxy-@value{VERSION}.tar.zst
@end example

@end table