-----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-nginx-php-fastcgi-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-nginx-php-fastcgi-14.1-jessie-i386.iso 9b46a9062e054a8717019dbbb34fbf7f $ sha1sum turnkey-nginx-php-fastcgi-14.1-jessie-i386.iso e9bc78c63582d9f026d720cc9dd3913c8be5b3cb -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPzAAoJEIXCXpWhbrlNOuAIAKVHmgMFEwkIyjxqhHad61da ZDJbKnvzjG6EWzUYwrE244bX9CHQTrrl8+5Jte84oRqqYoV6LXJwg01itQObCKIn EWnZj5uZfj4JEmOr5STw/7iXK3za431/Glow+zuQSjvgZXEPhKZe0Gw35mz0nLRM Cfe4FC6ds2Eim8wnfpdHBNKSyxLtVXHSRN7oPfOED7XAQKd5thzk4USHuXDHnLNZ IHSlPSeoVqUbjg+VBPe1fdV0y4R/ZorDDXJKiYxsXCvpamohRvuI3m3WNjG9SiEm 8lLWRwGCbmFsBhHGq9UPx5+s7D8UH8lvhoD5dMpbKsCtlNBEdU3jzTM8qujx0Uk= =TZbR -----END PGP SIGNATURE-----