-----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-concrete5-15.1-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-concrete5-15.1-stretch-amd64.iso
      f4d0e152433ef9b7f9b033279bec4f6a212ad7e191472038b62392faa968686d  turnkey-concrete5-15.1-stretch-amd64.iso

    $ sha512sum turnkey-concrete5-15.1-stretch-amd64.iso
      10854d22f825dc3d7c2bfcc8482e67c02e90c3da0a106bc36cb938a31ce9503c4077d6f68431ce7be5da54d9877d487426b76906ef0d6dd7f90dc1410648442b  turnkey-concrete5-15.1-stretch-amd64.iso

   Note, you can compare hashes automatically::

    $ sha256sum -c turnkey-concrete5-15.1-stretch-amd64.iso.hash
      turnkey-concrete5-15.1-stretch-amd64.iso: OK

    $ sha512sum -c turnkey-concrete5-15.1-stretch-amd64.iso.hash
      turnkey-concrete5-15.1-stretch-amd64.iso: OK

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

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uU1eGggA0IB6gmbVvwxW9234octXFzIrvYkyfyMhlEks0xzh0HPZtHuIa+cFX7SQ
Vb8vlTuJad/aVC772MdmBmzy7+j15PMu1cMFw8ZIuyrbWijXh1VRTo0GkYvZyDeW
DeIP03F5W/hVyVnn5nAacVrRQ8e5cZACuwZxXoKnZPUfReCpd7b9tXgHkU44uLdI
ME+9tcRuC9LCpST6GXqbmd/FUYL/tBO/zVB4dtA9DmEW2DTIpP1AcPQGUFtIJnqq
YR6pLEutlQKkDFrpHaZVeJ6NeujVkrQCWYnHNCMAwirMvDta3S8nadCy8pyrniR4
fFXNIG9opnUCznJMRHJsaGqw5yxr1w==
=vZSC
-----END PGP SIGNATURE-----