-----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-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-etherpad-14.1-jessie-amd64-xen.tar.bz2 21d3dad3cc81973f63c1ad7e899f0025 $ sha1sum turnkey-etherpad-14.1-jessie-amd64-xen.tar.bz2 134ab1ae7ecb4628dc7f1ae32022a38aa042c70a -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnyAAoJEIXCXpWhbrlNk9MIANa49tAzU6i7+/5V89zNsL/W yl/g8ODh/Fpm30h+7LigUsrAnOVdBfeLyO5uyEwKly+JxNQx6F/vbYwCNvq0cApR kzHIac2COAjGO/RDh2ewGBVNn0jtA+L7YBuUGBD9beGKl39oldp04XRPMQ0t4qEB kugrPIGVEF2o7EHM83WNdEq91JSozCtn/Xt4nxJQkFKwDnLgOtlJvWA0/FgiYzQP toCyAsBKsvm+fIf4rT8IyGabt9QNi2AGkPtP8oY4a3g6UzJ4k3e0YL4F+0+8wlbq PLaPqplY1lFKI+mqTzJi8tu5XUpaj7WtiVVpsXG/kqzAJRbx73ifMdVQ1WzEN78= =iD4N -----END PGP SIGNATURE-----