-----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-limesurvey-14.1-jessie-amd64-xen.tar.bz2.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-limesurvey-14.1-jessie-amd64-xen.tar.bz2 d95ca64ed2a66ecbea95cba7d48518d7 $ sha1sum turnkey-limesurvey-14.1-jessie-amd64-xen.tar.bz2 212f5bda97987406f961b1b24e4e1a73492230da -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJn0AAoJEIXCXpWhbrlNyb0H/jhZPcwsyDB2t+MFq6BxtQo3 Aa/qsm4SDTCjihT6zzL89R1EfGqcKnRKZiaOShBvkVQR8Hb5JB9aXIuGHfc0ET1Y IUi26JnA/mOe5t3zq33akrm9WE7Eru9jpH04WWv+MWsnWjEf7O5eT04sOo95otVY 83g6J/EuGGjhiXOBSrn7g0twcjw4GIUaYlV1+u2MoMqiG0qOx4NwPM5nw71KDAUD VgocOcwOlaRY8RiHFGOkI566eYRcG6giB9qzFoS03sslxz26fUg8DLu+4uR26tBW UWgSK1Tpk/naV3MH4ZdxSFaS2deIE1wfOBVBZQTu3pNgfSWBsc5sjTkI64yl5R0= =Ru5E -----END PGP SIGNATURE-----