-----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-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-tkldev-14.0-jessie-amd64-xen.tar.bz2 2b1eec35f00a9c015d1ed47dad5e20e8 $ sha1sum turnkey-tkldev-14.0-jessie-amd64-xen.tar.bz2 ad3f9e0562d81cfbfe19e4b76caac120a1d3cb83 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMdiCAAoJEIXCXpWhbrlNW5cH+gMhDNyMlr/GmY5I6U0LcNRb 3khS0peh3IzxmCETeQGF1ZBRFPjPri1hRSmvA5xT/ygpIKuE3SY+XooS+ArvvXtK LG7/IV5EEvjzBK3qrv0VuwY4e1hMd/jhU5ZuDsQOliX0eGmlRN1F5c2EummYFqEC OvHqrEbRRzVZQZsltcNw5Isf8Ib0t7pKvQ1AERxbnJKPte9RHwSdsWG/keZEAfBZ MsX9kT3/2v4parhl/xJ3EwsSO2fUKjYypJSBRh8maxKuI6zHprEIM/WYdec6HUXN LGpGqTaMnlNmBsQfYSYrEC+QvxUQwIKdvGh1nOZg8B6Aq+eUM0acjIXlJEg6V0Q= =8jY+ -----END PGP SIGNATURE-----