-----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-moodle-14.0-jessie-amd64.ova.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-moodle-14.0-jessie-amd64.ova a72f1f216c26f906754ecda3fe301b60 $ sha1sum turnkey-moodle-14.0-jessie-amd64.ova 39d07306f08571b8183e084c3d7c86bbec5a32bc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMJdXAAoJEIXCXpWhbrlNy68IAKyxuX3cU7VNxVIsJG/LFLMf W1dWazKcIkBq3ZHOO+9PbYJY5fiGFHbRb2rjpFV1K4FPxUSE7dlVckuRQvg7pUcb 4DekoEpzjxLspw5DVkGb0IwkI4ItZ8yjjyORMNPcMXW3oTtr1xAZeiPsVYUyCnTh Wv6kZsVIGUOndGilA14jE1bk3sku82lX+KXe6yQ6QnMoOit7NBCIP1sYcC6D9rLK PpKNDIxZsnEHpco6xMOv3uc+rWf5UfkU6w4M5aVrx6g13X1fd+6VhIzquEgDmC/V Cgdx/o9BL6B8UYGZGQFpEZrZxTXa4EJQ+/lFGSgU50jyNDY9OG0aQ2gGlq8LJVI= =zyS+ -----END PGP SIGNATURE-----