-----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-domain-controller-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-domain-controller-14.1-jessie-amd64-xen.tar.bz2 b2950a6adcda7ba04d44bc20ebda3635 $ sha1sum turnkey-domain-controller-14.1-jessie-amd64-xen.tar.bz2 8dd8ea606327114f5d2445a7e76c8c49091d3fe8 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnxAAoJEIXCXpWhbrlNSB4IAKppbSTJ5SeElES+q7CnYe+/ uBqzezev+/kkIwZd0NBE0tjXVpMXeT2GrwIUemCg+KEeGRtAiHSjRl6Y3tPvt//v NqVm9e16bWXrAIEmKW4QcX4UH1S6euL/QAmCefSD5AJpuuOF+mOUFzVINvskRIOb uE3jRHCazPxlN+OaTkadW2+Z6crWYb7Zf1MWmi6couZHl3Ik4AwMKr4ixVGL84Ad G6uH3FUBgaYEYsyDnto2ITD+SInJ4ohleA2FKTbuiIh9031aKmNO9DBCX71gyaEi 7qArPnbQYu1ZFKFimrOEbhOodv3mgRuXzLXkevXhFAEBxi3KwrZgNjw3zfuFc84= =sXiF -----END PGP SIGNATURE-----