-----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 $ gpg --verify turnkey-gnusocial-15.1-stretch-amd64.iso.hash gpg: Signature made using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key " 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-gnusocial-15.1-stretch-amd64.iso 52def91f336765137555ddf79456592e2ed382679c84969c271fa96e1ee7f89e turnkey-gnusocial-15.1-stretch-amd64.iso $ sha512sum turnkey-gnusocial-15.1-stretch-amd64.iso 5b82845717f24ea5710c9168495f3a776579cd28cd304746c27e08dbef9ee362480d2c1e9f95b115157f390e471b1fb31f74774b49266b09f5f50cddbaa3335b turnkey-gnusocial-15.1-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-gnusocial-15.1-stretch-amd64.iso.hash turnkey-gnusocial-15.1-stretch-amd64.iso: OK $ sha512sum -c turnkey-gnusocial-15.1-stretch-amd64.iso.hash turnkey-gnusocial-15.1-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlv/piIACgkQhcJelaFu uU3qWQgAuk5v+78C/h8LJmYbGjCerNNHdbG2pQJpQWVW96d5j+FDPuECgHY3E67a Wp7S5UycUoGrue9+nhqnMCJZELyGb/LJ9rRfgQGbwoK1/Gi+2ejYdULxvQf2FJG3 oyqqnUGYoyl36DFiewsRk6fptQDzJQOYowNgr6arXcXsrQKaJCu6oOqZWtSFmfB3 PwIc8Ycfm/bg1F9sE3eadEQEu+cb2svKasMERlP315S/RiLj4d451g0CwIB9upUv lJk8qlNxvdKf2bnqp1hQrU6+hVsPLKI+PTxo9rL7w3dOWzV+i189DJ1wIern1xOS wlSP9TZl+joVdneLxycPbi1DGR4SxQ== =/+7C -----END PGP SIGNATURE-----