-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

To ensure the image has not been corrupted in transmit or tampered with,
perform the following two steps to cryptographically verify image integrity:

1. Verify the authenticity of this file by checking that it is signed with our
   GPG release key:

    $ curl https://keybase.io/turnkeylinux/pgp_keys.asc | gpg --import
    $ gpg --list-keys --with-fingerprint release@turnkeylinux.com
      pub   2048R/A16EB94D 2008-08-15 [expires: 2023-08-12]
            Key fingerprint = 694C FF26 795A 29BA E07B  4EB5 85C2 5E95 A16E B94D
      uid   Turnkey Linux Release Key <release@turnkeylinux.com>

    $ gpg --verify turnkey-mattermost-15.0-stretch-amd64.iso.hash
      gpg: Signature made using RSA key ID A16EB94D
      gpg: Good signature from "Turnkey Linux Release Key <release@turnkeylinux.com>"

    For extra credit you can validate the key's authenticity at:

      https://keybase.io/turnkeylinux

2. Recalculate the image hash and make sure it matches your choice of hash below.

    $ sha256sum turnkey-mattermost-15.0-stretch-amd64.iso
      e6182ab9bf62e2e171a0cb278dff1ce951cb47c8b62637ac3123521b1ffe8280  turnkey-mattermost-15.0-stretch-amd64.iso

    $ sha512sum turnkey-mattermost-15.0-stretch-amd64.iso
      ced09819435499a277a0512e8bf221b2479d20e102e384a2a20d6c60e687b1354d1a83cfeccdb6a13e8a71f23f28275095792f1325a153e091591bd32a910161  turnkey-mattermost-15.0-stretch-amd64.iso

   Note, you can compare hashes automatically::

    $ sha256sum -c turnkey-mattermost-15.0-stretch-amd64.iso.hash
      turnkey-mattermost-15.0-stretch-amd64.iso: OK

    $ sha512sum -c turnkey-mattermost-15.0-stretch-amd64.iso.hash
      turnkey-mattermost-15.0-stretch-amd64.iso: OK

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-----END PGP SIGNATURE-----