-----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-phplist-14.1-jessie-i386.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-phplist-14.1-jessie-i386.iso ddaaad5e1f4e27a6052803783fe8a328 $ sha1sum turnkey-phplist-14.1-jessie-i386.iso 2592bf149e9adf02ebb92953b6e58d05722ff240 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPzAAoJEIXCXpWhbrlNgQkIANPQtISbNXrEKGCKSqD+mfjc VcAn4JkOJFJQhpeaVweAdEobMYkN6RyUGc1kfffhygv8tGWbliQMpgNJraNuu0JT QqAj4gs3FXCHELqj1ufgodl0fbwFpD3W8G93OYGDE4pYYDOw0A3SYrj5HwW4ECU7 Py4AmptaReR7ixMtScvjy2lLlRZhO2UXkFuwq+ucpuTI53/3lORKrnRXQftg9bHj tBYYC7js1uoLhVLhrpg7dJcux94N5eNdYvnl+0T7uVRcapB4/X98YaRP265evjL6 f9+Y//6mkyp6EiZc0YBkxJjV2NSoyABG0utFn9RVNkBKzInKslcQIJ5lgMPytRM= =Vei0 -----END PGP SIGNATURE-----