-----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-domain-controller-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-domain-controller-14.1-jessie-amd64.iso ef0f36a426e728d3e5bd4aa331282213 $ sha1sum turnkey-domain-controller-14.1-jessie-amd64.iso 992f5e931751e91ec57af80a44cedfc7ea898775 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlNobIIANqLM7SdmGka+c+vKcjgj42A Ccsh/Gc47/7x99EXYR9VyljVUAQAB2DlA8FGRIkDuL3yKuVKArgs9wQ8E5hEpHUY J+OzklT16lkzp16yJIvUVJkczV9coCfU5Fk4s7aWCwG4bGlk5wGcc2OvTYQzs7Qm lUKZgfrxRwU/CxgxtECCcMUcVF/p64lfIUWzadDfgYtwFOwCe+qgCcm2p4WM9BVP aOodHD020LD3tbm6XvvvaOGDdVTPc13OSiwl7TFucj3kT3IuHvzd+peSTiHVc122 jcFEAj3y/EMHncJrhtvDqYqvLbhMpJNeFHyYQylKjx7b8wKrF3w2PWXgRLdQrX0= =o4Rr -----END PGP SIGNATURE-----