-----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_14.1-1_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_14.1-1_amd64.tar.gz 0eeb23f4fb2b88db0d347a21309c0296 $ sha1sum debian-8-turnkey-domain-controller_14.1-1_amd64.tar.gz 04feb87a514c4debdfc041b9efc70694671a475e -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnqAAoJEIXCXpWhbrlN4+kH/1qUHIL6nvF+wjsgXG3MVXrm e67ZmmPBsCiqq+RmAdZxOoTMAAWu16Q2zLPWDPtSEpgqbEmNfmM6s9lHbBwZD9ss 8ZYYzg73zNizcu67rzWTv6HfmTtIHC3t72LmHnF4dqxlPVCiwRL6rwx3p7vRwFop uk5RxorUwqpjx1fBkjH6hyTTV9n2BmOT7a+ibFirfKODZ0eNkAPNvFxMWbuRzHnY fQwS//2r2sdX3Lz2T2Dz/oJRwh64AIeudKSyzSTdUnIsvXeH9U+yvREs7WiCw4Zq zxVDKf7VpO8oQLOeOuTzFRIMFGoNSJ2r4jNeDW5nofsxqvSPyoaSxl85+IgbUfo= =X6yj -----END PGP SIGNATURE-----