-----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-xoops-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-xoops-14.1-jessie-i386.iso 0b77b075c41e07418cc6c70fa7c06295 $ sha1sum turnkey-xoops-14.1-jessie-i386.iso d6124d8dd5c0f8b76d40ff8de903183c0b4686e3 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP1AAoJEIXCXpWhbrlNJaAH/3CCUmcClLUCU98xs5VxtOSR 6Y3ZoaSzVSJiMpZusZ7aEzzscsdy4caM/kvQ9vB/qu7ZJ1vPONu4t91TMeD0+acc PUx7+UgIwnaC4hKlIqbRyKR/r7SibqXbSwZ8OXfkZ3wqCGgG0NiYS/oLBpT42yop 1bA1nGDKgWOubViTO1WznNjNXXWgBu5LqpZYX6lA2YUZk6L1sTlAsH7cvcxsNLj/ c7RKpCYKuut4Wf2DsJn8VV8vNNBj0VjZVJ9UyFWF6yaXJR4Vn53w9wmqVTUMHkMc LrhKy1mhVvLWbn+fa0LRIMUQj1bHMXExe7S3c1oBSDA9A+fRTVTaGUD+O6AoV2U= =Mj/S -----END PGP SIGNATURE-----