-----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-symfony-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-symfony-14.1-jessie-amd64.iso 82f0591b78279f19f56a9da6c17b689d $ sha1sum turnkey-symfony-14.1-jessie-amd64.iso 05846dbe7c56df2b246c579c9831889de3b4073e -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP0AAoJEIXCXpWhbrlNKK4H+wSh+n5KyVEte+F0RROs013p fj/C+0I5TxkySkawWE3hI73ZfzrT0eXoUYk8DEAlAg6meWz9/3WEUtE3aUpjYRST U3y9mVPI0ydiJhWzdRjC2AYMAVaSkdfkzkNZ9g2OPv8ivXjxKFdHQv8dzBYvQ+O6 TTPsAzqeZI+K7uVCUkRgt9aI4ktCsfPLagaEGoMe3o02LQDeRYycttkC3jHwRXz1 dK7Hu1dvmKSJFNsZcYXHUltFzIimz34vTLgqh0e9l3Gc2j3ahlYCs24xL9nMzz/H E19Ni2QA0Lx45flPyor94+L0h4vjv14aw4u5vPe8BV6NkhTD9UT3/vrI9iUsWxQ= =rkud -----END PGP SIGNATURE-----