-----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-tkldev-14.0-jessie-amd64.iso.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-tkldev-14.0-jessie-amd64.iso f14b12168fce09e5304179f0a287cefa $ sha1sum turnkey-tkldev-14.0-jessie-amd64.iso eee2d3932f087236bdcd505de0a939621ac93c35 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrqAAoJEIXCXpWhbrlNdmsH/RLBEAxT4aVdHzAEv+E1u3PT U5BchOaZEZm44VrFAeCVvKN/h6Xvr/MWmyCKz6UnL/f8gnuXC6raoHdBJtfcHtay acVQOQYZGin9kxu1vVHXUmDPSY7sTf5Jo38E5+2PlXtju+9zNi+5cCrMtlN+G4bG SUNDW6CiOmcWkfLfOcQVznt/Z/bOxSzRcpnBNWQRstchG2VcUfwJPHYih54oIz+g sOaoL2R06v44CfMWMVzXmQGxnNCiZ8MQTIe5PigWc7PPVF20EvjpKnEH5QpjG8Ou P4chgRuVGlYlhAFM3N6aMPkuzuFDS1zGedkfKlGLJVJY4+E6TbDKFasIN1O6Vk8= =AcZ+ -----END PGP SIGNATURE-----