-----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-observium-14.0-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-observium-14.0-jessie-amd64-openstack.tar.gz 035ac281a90f49a178c33502005040c6 $ sha1sum turnkey-observium-14.0-jessie-amd64-openstack.tar.gz 45e99be780f5ffb3efd408034a03af838c482768 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWXYG+AAoJEIXCXpWhbrlNppUH/jvmU9vWav2mHwNIbUKJitO8 DbE/YkT47NWVBLThiuAmS8pzUth6gOSJBt0l9Pi45XviCvraPMcChJfwe5tD8loy oxxBxH1eJE9HkiLE41CO/yWFbwy2HNIyj7o9eZz+TSsQWIRmiIgV55ld/Bk4368B 8M0PsOGF29vrmTUy03wrXLcFKOigzhEQrMdhP76Ozqik1Pzvjy0TorBwWXCESxSK sgii6J0p2dM4BAnzjQ3unEACf3L8G2gdKXzbpDYcqIsqUZyGLF4ulk+UoFEbyINc xOyle5GH2zFbMVErZnjbMdnUtJjM1cF87XT5Jb5WHyb6Gh2Rk5Z8YMpb+r82+gs= =R/Qm -----END PGP SIGNATURE-----