-----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-14.0-jessie-amd64.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-14.0-jessie-amd64.iso b6a21739ff8ed7ce26983f04490601d6 $ sha1sum turnkey-cakephp-14.0-jessie-amd64.iso 7b905afab65c631a5fef16151bed494e42c9605b -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BroAAoJEIXCXpWhbrlNRkcH/icSm/eAUE6W304/VFrX94Fa KlH3BRSHPFnEmAc0nZovCX0LNgnDprHnmIy6TgBlxeBUlW90Sswehj4/qX2HiAyZ v9/4uEh9xByMreYhA8xgRaEny1B78bovQMvnB/XGJV4EHq8n2WYorh0iQN9hTh91 06BkCr1VBOqvcci0sfgWqFIJPDIyR6lUQ+SR6lUSTQ3I629DB8DVhoOlsbTFfyHl P9lWsMBruK2pDkn/SBLBSx9b8JovjwpMTfQfG7pJvFoSxuMr13ZqF7bj3di/Cy1m ekJQjwrbiST1Fc5vMSO0pp4CATdYR0GU8ZAQ6zrGHfSJAfmIUsyE0UHAgGi1VkA= =Y8RB -----END PGP SIGNATURE-----