-----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-cakephp-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-cakephp-14.1-jessie-i386.iso 443f08a9b662a773385ec9b700b3f1fc $ sha1sum turnkey-cakephp-14.1-jessie-i386.iso acd7fe3199f9ab03b50b6d983b88d2c6aa91ccbe -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPwAAoJEIXCXpWhbrlNhEMIAK1vZMUO7B1inqgH1VfKJIlG /2AgASjgu83c1UE6KtRzWudTricxBmJ9ZEs53VjY/IU13F56M4r42ysokyrD9sws HZgZZfa0g+DgSEjVICgFaqbvS7RAdFpSqjD8vov2+N4eK6jJ575+ueWZ4CVY1pe+ wxfXdlJ/94SNH1BGTeFcOokmkEcQlliC2+MfjtJI9KRSgFK1tUa+USl7+4MPGqbb 4nkiXMyqyw1pHoR/P78KxwrUqk1MpH8HK4PbUgcpZq3MM4vpVQKYOV0+4tERFkb8 b7g9LfORFqaCo/dNJHoNmt0KYd4VWo2eoA/zf2KE0H7Qy8Pb3fWO47Qn605ggDM= =f9Dw -----END PGP SIGNATURE-----