-----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 debian-8-turnkey-domain-controller_14.0-1_amd64.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 debian-8-turnkey-domain-controller_14.0-1_amd64.tar.gz f87588ea9d0764f7cfdc5169d7d46c07 $ sha1sum debian-8-turnkey-domain-controller_14.0-1_amd64.tar.gz f131a810b0a387d7e47dc329f4ac7a0d3cb0f61b -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWObxSAAoJEIXCXpWhbrlNNQcIAM1qzYRa0emOQMjFyR7r7t44 mbNMKOq966W7+aiy+ElS10Ib23LwbCjS6LCgF8koN3VQkDps3vCM/U1VAiwiZfBl eqMeDICiko+IslUD9X/qHHbj8Gz0CYPRXVgBBLvcTM+sDjjUl2JBzG81g/VrTnUI VPPLG6cdJ24VcVrFUvexCN6ASr2/eafXnP94zIJ6Krv6eZf2qams4gYwvbq6mQK2 oHQ7hnVaQaivr6Qo843QVCnWivR6dPDmlwkOj5wHwZSha7WzWENIIV8CHK0sxQv5 JVFObpfT352Vi+EGkuWAMv49OJEyu3gVhiA5YZkMmqVuz1Q6nkUbe0T3UtZRUCg= =R9q5 -----END PGP SIGNATURE-----