-----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-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-moodle-14.1-jessie-i386.iso 99934ce977c1287a966a49df6b4c01e2 $ sha1sum turnkey-moodle-14.1-jessie-i386.iso 48f5c38094924d98ed2ebe9a1fb26087446af5b6 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPyAAoJEIXCXpWhbrlN2UoIAIMGLlkiJZSyaH8Sz10hFybO 7SDmBI8ihizL7+NVCPr0bRUU+e9MGjJnsl+T0Lf/tYnfEGkN1Y4GhP53ulQ4PR/r 9dKAjt3io/59J2ebpYm/E4S+xf3aOqToBksgB4HtEHFq5ONspG9T2bLAQGvWu5TJ VZVKMf0m1gmMJch8K4YPcQGwA7zaacZMKpnHrslWQmSP3rU4CYs52NnPP95AuFUe lnv6w/nP2p5cETdkJr8kVgSCLkB8RPiKnQY6t90BuJdCkzEPG/5Zbs0gcQR6/T/8 SiMuC12WdMSD5zRLk2lgeaPE2QdRWVgBMTERJIOy41WWoxAYDKuwwTxaXGLaRzc= =xbxc -----END PGP SIGNATURE-----