-----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-etherpad-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-etherpad-14.1-jessie-amd64.iso a64650543cbbc0ef92d43cab2350cb0f $ sha1sum turnkey-etherpad-14.1-jessie-amd64.iso c6163ae3291bf51991efada755da8b52160a1375 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlNvE0IANg624FmnrzOQymGhTgMwrnH Qi5gdKR3+ndr7tAD+cVrHivmX9Mbhv3FjtqG1OZR+0qqFunmA2Ycu9nBoz/ioKzs NOzyn8STWLNKUFTNYu0EEFkwUx7LdRc8kYKdEI/F+0bZPUg0DtLBkdIEb060BuFL e+bwOOELYfIu2UkFHFanpt8dhjsTz/4Uh4I7nAAnB35h5lvVxJKv7y1UDIC4QS// tnM6f66isDxDfD5VeAMzDP8XFDO4HA/XwrBJT+cl4BE5hMVinOWQWMobktP099wz WpQmZVxRikwNYfaPTfKWpX8LJcrtZicbYJqjjePodEcJ0ANkBDUDIpNlk+g4evQ= =bzRA -----END PGP SIGNATURE-----