-----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 debian-8-turnkey-nginx-php-fastcgi_14.1-1_amd64.tar.gz.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 debian-8-turnkey-nginx-php-fastcgi_14.1-1_amd64.tar.gz 978fd15f772552cf7a8494c69fd4b0a7 $ sha1sum debian-8-turnkey-nginx-php-fastcgi_14.1-1_amd64.tar.gz 6f031757bf378015ff20cf7aa9f2d0c06e9def94 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnsAAoJEIXCXpWhbrlNSiAH/igP+DW/neU/jzmsY1x7M9y4 US/PDy6iA0WOw9ivvYWgDRqbluVXnZa/EDvUKV4kP1BJYAVNydBXMZCs0lQdFjWb P/RWZhwfzPr5o9IZi4zLeEFBr3LHIvpuN7wjUwZ/B1B5YZ1rx95FYTp6Us5CsXPc YbCyOLFJtZJkbb7l2Djen1TvHi3om6EfnKlH0IC3v6lKjgFwWBCsPCvkIlaHDZpg aDgD89s24nt4ippAj31NNBt2N88WywpFEG3XkzANJIMMurNZdKv9o734l+lJxKTE l1bGo7fWKrHkmkC7Xx28lS91VvULnACctob8kPJBejtWKA4xGf4KvNWj/zYym94= =EYy8 -----END PGP SIGNATURE-----