-----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-collabtive-14.1-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-collabtive-14.1-jessie-amd64.iso 438d1a1b5332a801a5e1a342d1d3d387 $ sha1sum turnkey-collabtive-14.1-jessie-amd64.iso f7691d78d010ec1490998afb740bbe8b57858e4d -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlN7lMIAKIPBWVN+5tcM2IFXUpyhzdx 7lVKRPSH6vUPP9Vgo/CTBTjwlYvZC+eKZvUJcp1cMZK/vq5TrRy0TNhuee1IILVO aGNfgYHma3F67h9gOeOV+2tf2CzOnKrAUlMnDPdMtthw6FOIsTGfpedTc4I+YI04 2LjBO68gxGx5YKqo9gvn5ykFg3RmjaTQ6HGNoVxXauG/0pk6W7/jSTlXXv92kddp iBlhVr8h46GmYQmxyvrgP8KLBdGbb/kef2ewBTuOFIBZBqmKrahinA+pQv3jSPeZ UfnR8pV2zPbOuu72EpH+Egg6x71zz2r8LHHkIc9vNx/MdhjvUq0BqR6bPR01lKQ= =rFKM -----END PGP SIGNATURE-----