-----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-concrete5-15.0-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-concrete5-15.0-stretch-amd64.iso
      13f1c5aea34590b47491b30fc79051ee485164a9da517ce43648d33cda816dc6  turnkey-concrete5-15.0-stretch-amd64.iso

    $ sha512sum turnkey-concrete5-15.0-stretch-amd64.iso
      e769d5634bdffd3f9ef2da5ebc78679c8b667f3c0d1258c77eb673a0edcd4c9572058a1222de0f8182e41203bb20df4dafa0e19ac7c64d9b384a59bb48be38eb  turnkey-concrete5-15.0-stretch-amd64.iso

   Note, you can compare hashes automatically::

    $ sha256sum -c turnkey-concrete5-15.0-stretch-amd64.iso.hash
      turnkey-concrete5-15.0-stretch-amd64.iso: OK

    $ sha512sum -c turnkey-concrete5-15.0-stretch-amd64.iso.hash
      turnkey-concrete5-15.0-stretch-amd64.iso: OK

-----BEGIN PGP SIGNATURE-----

iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAltMlTkACgkQhcJelaFu
uU1rMwf+ILyVNzHpKW+rCo74GvkhgZ7DOAHIGC8UzAY4k7GaVzs2XmP89mupoqjH
qzZq4TCeav4nE0P80yyRzxAOF16VRdrPduvVrY8dHqbpeUS+Nf82nZ6v0jYvJyDU
F/PjLa42zHzz6PUC3MMAaZpmSxkvjW0nHQVEeXk9RG8JjEh9v7RzpY4WJo40xGhV
K+QqpmmonEPFrULk4bs5kOTlpqtoXVuzLeH0lioxOUWfkbT9AjlZOVjFgzu8Mt8O
GuVOpfgD92Nr+VoyUm2Vz33CX5FL7A0R7zHMc+7KKlvsWEkLT93SjfPqDCjKV5Tj
Ze5S27yvcSLf5sVZWHu7yBq3tgL8/w==
=11Ne
-----END PGP SIGNATURE-----