-----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-moodle-14.1-jessie-amd64-xen.tar.bz2.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-moodle-14.1-jessie-amd64-xen.tar.bz2 b338731bdc4179b4e8d308d78ea3a06a $ sha1sum turnkey-moodle-14.1-jessie-amd64-xen.tar.bz2 a127875e12924b44e92d04963c9bde1343205734 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJn2AAoJEIXCXpWhbrlNILEIAJ8jpk8A4+cqij/O0JYFPjda nSugN5rVUp0B4WV8m/MPZibrg+QQx85ZjNjDLnF+KZxJKrGeejUfPuCq4axaJ0p2 YTx8Eps6yhrYVdj5tsc6bp1rMo3LgouGupoQzZqv+eRZIUIpSSyAOBwBkv07SRtn d19vVLPGIqsHyzl8dIvCPuVp0DO4lV3cIwFKVGeX/GndHNlggRhzoE6jdBUY5IFy IC3pQBs8AA9i9tQYujVkQQ1QRX9Dfhk9aMOLm1Ckt0cQety/RjtHkixMgSEExKb3 bfYwAtV/ytyCLiPPY1eti2EhuSqT4fvNkoiGCpkVsYsZ5atR25UgzIB+uU4MBHk= =fHmm -----END PGP SIGNATURE-----