-----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 debian-8-turnkey-simplemachines_14.0-1_amd64.tar.gz.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 debian-8-turnkey-simplemachines_14.0-1_amd64.tar.gz 024ed6ee3ce0de8f2326090effcf5258 $ sha1sum debian-8-turnkey-simplemachines_14.0-1_amd64.tar.gz 763d7ef74cebf7bf21c86f5744e74fcf0687f10d -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWObxWAAoJEIXCXpWhbrlNoloIANxeAoMg0FL0Sc6Z713AkOqH ZLzhggAy0luTTnYy7QRImrfit9lvsbq4V24fjoSvznbB8NR36xoV66m4khxHsZQN 9PmCBss9yexkJjDl3aHvcUCsNhiGofDEthmZNujQLqTQWfgLV5TV+Piphy63uM2Q Igbhvb+Wir0DhxDd5dj5JoxznD74BuB6GwbQyTCpDshOi++DNr5PsPk42JHSn5uV xK+9teb/VY4+MNPC2Of9FXQx1mzrtsMJR7/NteWADQG/oK7OGOvkpMBIPd0KZ5Nu xxvNLrD/BfjrFg/l20YS4dn7S1gp7l+xWpXvyR09TeBFGY8pq0TA49VTka/pTqI= =6V9e -----END PGP SIGNATURE-----