-----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-piwik_14.1-1_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-piwik_14.1-1_amd64.tar.gz bbb31e28ce348908c800a99134bd08b6 $ sha1sum debian-8-turnkey-piwik_14.1-1_amd64.tar.gz 1de907a0879ac9f7036aa2b8e5b251d2624208c9 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJntAAoJEIXCXpWhbrlNt8AH/0hG058nIEtMBMIgacVELlmp Iwl/mqwkS7qk5q+uSAQy9w+G4ltYROLdMs8JuC8SzBkMorcOaWivT5QK4zAofzMx m1unKBQq6AGqQaqwn50A1DpBqwauQmnWQGHnhSs9z+Rw23Jo3fwzRxkQ5j5ErZli uzI0BV6ypVboMVHvV3JIVXke5g07Q/738HsBmp499Pa0KV7kJmmA+rW5LqkGJnJ2 46luMYlPhObAqYXwVHYM6gjDV2tVGxrH7DN+XWToZFhgu3x3UKw1AwKsu/QJ+JYe y73OxGA5kLW+h55SVti2/klfV+83t9thht3J3lr0tTlPq13xN2zx6JQkCK6Y0iQ= =c2L+ -----END PGP SIGNATURE-----