-----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-limesurvey_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-limesurvey_14.1-1_amd64.tar.gz c2e5086aef1736c8084e1b9ebc09e956 $ sha1sum debian-8-turnkey-limesurvey_14.1-1_amd64.tar.gz 8051e7b5d9664e77b14cdefebe1cbf0e09851e9d -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnrAAoJEIXCXpWhbrlNGfYIAL+wDl3khHiAL10hA+YPrgHF eCdgf92X8fZxrEvgdbQV1Uh3INw2NEtJSRJD8W9qGre3b34/Nm01ofSNo3MPRpg2 z1RrCpPY2dukABlCTHU3I13HqodeRnLPZVMu/LKqWjwPVrQUKrtL6FGti58VE+k8 oyp6ttgIkdxX9MiyRR3oIDwLuJgA0utK//H5V6SHDRXqY5lfHJNG6Wnl195Jm4hf mEjG5AUe4dBLcOmyCjjzgARNqzDTqXVlbif1KiUQJxeAZJ/T/qZQfvwfjkySpF6r CPk39SyhC9tQFDyQxh+Isi0S09Ms2O9NfSqtDEdCBUK475X9D91yVUqeLCtuv/A= =oudI -----END PGP SIGNATURE-----