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   ed25519/0x3A528DDE952C7E93 2021-01-09
      7531BB84FAF0BF35960C63B93A528DDE952C7E93
uid   goredo releases <goredo@cypherpunks.ru>
@end verbatim

@example
$ gpg --auto-key-locate dane --locate-keys goredo at cypherpunks dot ru
$ gpg --auto-key-locate  wkd --locate-keys goredo at cypherpunks dot ru
@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:ddOaswnUBtNbuoEBYQtfcF59sR3Bvzo9pIfSlw9sKx8}.

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

@end table