-----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-mysql-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-mysql-14.0-jessie-amd64.iso 2ed0be98f98ebe8ba74b76154ae275c8 $ sha1sum turnkey-mysql-14.0-jessie-amd64.iso b743340dcb7858cdf3a08e849d64fd27de0188ba -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrpAAoJEIXCXpWhbrlN9ggH/2KuaEfqFLYNr+EIskaQXIPD o7wId/xVZJhlomSBkWtqNqTsyQnqRedsLjzoOAEdi99Bwxd9hx6Qz7O9U5gth4Y6 BC5GW7Um8JFl06pDBpsmbeyNlkVcjNi4eMKAXM6qvMQFATtQRdg0yeT9JSPYKTOh JbVFOWHwfbyKPi1lKs9puoJ2fftIFhRHfeKgY7WU+aZYZMWdcrf2ZjaznwgxNhgL K0VIhy1S2ghkimA+DJcUj84D+6TNmkIkRl8qdPxbPT3dHeSff+s6/pL3gxaFNi++ follsBDeBItADUo9I8BQy5lCtTxhR66tx4Lwqm9eRPMTgRngcg7iZB+xyMNFzzY= =ZU75 -----END PGP SIGNATURE-----