-----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-gnusocial-14.1-jessie-amd64-openstack.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 turnkey-gnusocial-14.1-jessie-amd64-openstack.tar.gz 7e67eb59552238eff914b03cd9ef376f $ sha1sum turnkey-gnusocial-14.1-jessie-amd64-openstack.tar.gz 56d936d1a04abf3d3c65b5b81c68f5c1b69824e7 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnzAAoJEIXCXpWhbrlNmN0H/3ayVywCwR8vQXgr6O00GyBX AM8PiYxrXklKwwdO+BLO9D/aAdT6c4OEFQ5SZLwsX45/P6rDg3CcHXlvgiO/qV9n oj/oGva2z1y74DevSjzrtE4q/7Z63uDl5uiZLwmGB/7kLfQWrHSzf7PCQBCaDMYk JwUU7fIVRZDYLarHJ0u/N0/Ws2lX5xF9V1e7Km6atBbn534dkxjs3Kl63OqZhlrr dejrFMdt4s1+WK2uJ4c13HrwM4lzAqGxWwUAWJMXITfvbpF9avzu1JKLbW710joz WJDPVVNWulWbfFoqgITPTWUHIwdke7BSHKy32w/aFtqn3ebXyu6Bfi0NS+Jkjfw= =sVYF -----END PGP SIGNATURE-----