-----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-sitracker-14.1-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-sitracker-14.1-jessie-amd64.iso b69195863df7dc4528d474f035410d01 $ sha1sum turnkey-sitracker-14.1-jessie-amd64.iso f90b0f087534213827ddb46300a979b55121a159 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP0AAoJEIXCXpWhbrlNobcIAOkz/SVSbOWJ09rd3EHLtMhf uonmlNmOm7qn6L/kyuj30rnXp06F9KvJog+63Oko+pKiXOJjNML0lOjY2Tw0nRfl xMQRYXoVf+MTWQuS/h+z9XqVIvZBqyGNZJvQwPYjX1ssDu0IElBmtL4yRmOMOqXx JdJ4xIfcx4ClTukno3mW50HOYPr4Jg1LZycr07PKMxjB+nYppDVjiBPxjPIQIuo0 3yEqtQDxVIMWDcICflE8+Je2EqSmeQfoi5WJ2xemzV0mxunKhU1cD04vzgey4hw9 zG/iqxHEq2/Ob4RvWJ027tca0KtUhnGHgA77FPEpLPxkY0YkzWi4mLf5zncxYMI= =MXGB -----END PGP SIGNATURE-----