-----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-moodle_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-moodle_14.1-1_amd64.tar.gz 2e256ed3a0ee4901797c1ec4ba5e5cca $ sha1sum debian-8-turnkey-moodle_14.1-1_amd64.tar.gz b2c31f2be5178c69b8723cd3f7795fc414066e4e -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnsAAoJEIXCXpWhbrlNYtoIAKME89DP2c6fkfSbDjyXRaqn haW+ro0/931Nz5x8zRSUhJX9SfcnekajNvcrFGnXLKFx/2afUGyZUMgYfELsZzuJ 8PeF6UmOK2fnXyGiyKc8r8V1SzpFNl7s/o40Dh0/GV+3BXyYcdjNXDDalAlP1rj8 kKEWWfKitcwPdA3mDh/rZHCUGjChY053vKmCWsHzrVNF3S+MhB5dMevdBtXcevF8 Wnazxut7f10ip4wLYfD3iXVWbTFDU+dqcIJarVaUlcL1D5FYYcVpo8LcwogmcC49 aMynxeJD0Oext9vpKrrRAFkXFdN8QPcn+jIR7+AuWoGjO+OTpIcF47K+TiIzHrs= =Hn+O -----END PGP SIGNATURE-----