-----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-foodsoft-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-foodsoft-14.0-jessie-amd64.iso 4a791cd3d95d393ec6c249402fd656dc $ sha1sum turnkey-foodsoft-14.0-jessie-amd64.iso dcd966dda131f1979896560c838f6e3c6efab0df -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWL0DYAAoJEIXCXpWhbrlN7VYIAJNW3HvX1IxYhhhBiu3Cz0h7 7EKgrtQggRh7byaaYkidV8QkFmZDtH+w8Ou2jDJOl5GIc9AOoVBet15rTco3jZ/5 x9OCr5+GcZhzMefSRCP7cRa2lrFSKa4TtsnOVnqNLtrVtwb53ZcduKvzZODALD3l w5b2MnQoyPX83Vd48Cg8EYuxrhJL/w4NEKWstZQQgvbBISwGnZgZZPEWMJCtP2Xm UotyU3L6zQAZ3tQ7J4tMyT4Q6SgBFzT7jrJLOQaST80KcWc9j4//Q119DwexU8Qa VMA7lylfMqZCUmA9/lvZKStrlSzM97hdg1JYs51Kd7Cfwto+lhdGQMs2pun2XOk= =66qB -----END PGP SIGNATURE-----