-----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-e107-14.1-jessie-amd64.iso.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-e107-14.1-jessie-amd64.iso ea76833328982fae7a849da57f92b615 $ sha1sum turnkey-e107-14.1-jessie-amd64.iso 299563615b082d240f202e33d79b0de97c133037 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlN5xIIAK+36TNHFyQN/SwiIzlrOWLh KUVDqaZWuP38oEUgxEauiKBXQq+Lw6rl/aMKlhBXTPicEhOjjykr9GXVJpXuwhdm KQ6nRk5BC5h6fWMKLCMq1R+Jbdt4zcbT5KiYdDd7ayP/rCMHBLJKj+HD/sMS8Scw e9UrpurFkU6JMejJPA5BWfNk5nQFISeexCY4qaTyfPTSDL+NvokfhJj45VtILU3o PKlEi+GyhSrBsNAbVxVeU4pNPxoc9wEqC03zLC17jVDDTEFfSO70dS1hu7M4PmEe Tld0s1jkML3K1Zc26fZHCzhj1xaENa/lJWrX/XEImQvNE9uD6TlW/alKtGEo7OQ= =oJRn -----END PGP SIGNATURE-----