-----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-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-etherpad-14.1-jessie-i386.iso 0fba452d98ca6bdcc9309880ed528186 $ sha1sum turnkey-etherpad-14.1-jessie-i386.iso abb7dc6ef4e6e38e14894399dce02d9ed34868fe -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlNa1kIALHZC21C5bJ2smsf6Gr32ybk wpohLlWmugzslfukoggNavXoItICAaLjLtUFItdDbJtMmMWIn4W3fWW6lcMZEr4p 65acctxOPWu5cvaHzkQbtQ3mXCQ/bJ0igK+apzeg4Ducv+OklG31nbq+rSZTyN75 aZMioIVezeJjeURJP0Bs7m0VDmnDNWyG8d5zZY/s+iDrbbbtu3eVotODl2a/M/9u 4m1zz87Q7Y6xuqd24uaS25/XncC8vrRsmQoqG2NRmG61PTB0FHG+Y1dUJnznaB2I sBGOZgxn8pXyN7k/dhrYQxyPQYAuzJtlso69w37s26CdU3/UF8K5dU1nLCTzPMI= =y4Y3 -----END PGP SIGNATURE-----