-----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-symfony-15.0-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-symfony-15.0-stretch-amd64.iso a6d81080cf8814d1f70640d194d174accdc4c9bcfc3a308dacb8b50ea7307dd9 turnkey-symfony-15.0-stretch-amd64.iso $ sha512sum turnkey-symfony-15.0-stretch-amd64.iso 6ad7fc9422c200424569112d3d94911a87f0d5cc6ab4dcdb9f9af63c9390002503ad80b7bdaa4265dd2f12c4a4a08e60115b3016e18a81590f1f16cdc3fd1126 turnkey-symfony-15.0-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-symfony-15.0-stretch-amd64.iso.hash turnkey-symfony-15.0-stretch-amd64.iso: OK $ sha512sum -c turnkey-symfony-15.0-stretch-amd64.iso.hash turnkey-symfony-15.0-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAluD9TwACgkQhcJelaFu uU3hhwf+KFbID++IjiqWDDTcWkKr4hSkkTfFrYO/nTqM5xtXGCJtQ5cXDBIoFpl9 EbEaWcUAyjTkGtNgxI27C0uv2xf3w26mEuzpd/gHrn/eSGiNhVsalRMMnpCaMqvQ /XUkaG1VKAXswzJB3NcyF7x10aLNQ06eox+R22yariuKx0N5nwfFkQyNQx5OyYjT +sGlesbG987Y+S9LzdXDSNUacZqJeC9NAhrLna01UNTLuhpw7WHf8e+6iVK1d3s0 OtCgAUVyb/azYJBIuf4mkoDFAsZeig53Wcz6BGi7X5hZIhBBMGFC+4fI3Pqg+gsF 0TVbp5aoAJc4m2Jp5NFY8XjEvGLqXg== =WNRa -----END PGP SIGNATURE-----