-----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-phreebooks-14.0-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-phreebooks-14.0-jessie-amd64-xen.tar.bz2 42737aefee99d9c93bcbc17b9cc89f81 $ sha1sum turnkey-phreebooks-14.0-jessie-amd64-xen.tar.bz2 9f3d3742ea9be129a5cb8eb4c77825649ee38d7c -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMdiCAAoJEIXCXpWhbrlNNtEH/1Edmr134zUBAUm3fBy6H3Ey VL5da8XUvn0UpQqXIy1GXHfr6k5jMbgEBqamzT6CdPf1d6UASJfAsKIcoTGVprNp HM2QkOMRYLWXhhjm+BllK9WpG3aeUZqNQeh7LhsfPPZXalWSund8yp0CKkPoFjYO ayJBUllrSTOij9d97TMuKh1873WUYA0UAu0dLOlnH8VnZlU85cTeNk32Dn5Ct9IQ Po/EBsag7Fnq8/OCk4DfEERGeWtPT/h2mYoUQLanaCZLWHDbwgU8kEh/eOQNTQYu 1MvaaHKHxS/0YWSLoXBpvLkgqHtmIeQ/GFXrWgJyPnRxKQCLWf5e/FzUs0cF3N0= =WZYK -----END PGP SIGNATURE-----