-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Two steps are required to cryptographically verify image integrity. 1. By verifying the integrity of this signature file, you can be sure that the checksums included in this file are valid. $ gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-fileserver-14.1-jessie-amd64-xen.tar.bz2.sig gpg: Good signature from "Turnkey Linux Release Key" 2. By calculating the image checksum and validating the hashed value is the same as listed below, you can be sure the image was not corrupted in transit or tampered with. $ md5sum turnkey-fileserver-14.1-jessie-amd64-xen.tar.bz2 c7eeb80598b99abc4f2aedf06ce3d481 $ sha1sum turnkey-fileserver-14.1-jessie-amd64-xen.tar.bz2 f869769c3fc2a343c0ae1bc9a365e3ce0736036a -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnzAAoJEIXCXpWhbrlNEO8IAJcWLv4jcngluUmn24zasQ9B CCcAtg/KjlQ+qKthMBdgGwD1dy5AlOZHMW1XJT8Z1zhC3SR98fSjMBx6UzVtOeU5 63VaLh+zqRarexjo2aIXmbLq2+GlMzx2WoMJSN17X/shGyBr5yrNtCbQ84BOjl/I dbZIbE0NrsAoIHt4BU/tzEr8sLMSuFIEVJEu3ht5wnn8FQY8zNwR+nw4R8+Doe/x X5f2T8pceevXVgTCglHbuTBQbuZKiC48WneYksRQ5mYSwB7rXfs+ZNpvU076Fyka h3h96Mizh15qmzarSw90/PMhO/6CHmjUAUGKkDDh+S0RSXi1I0AK0yDXRLk3mW8= =a6sZ -----END PGP SIGNATURE-----