-----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-b2evolution-14.1-jessie-amd64-xen.tar.bz2.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-b2evolution-14.1-jessie-amd64-xen.tar.bz2 02da3225dcc8caee122b3c49397c08da $ sha1sum turnkey-b2evolution-14.1-jessie-amd64-xen.tar.bz2 254f1f719e5b166984de11471dc6ecc72d9aa262 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnwAAoJEIXCXpWhbrlN8qoH/1loRHPk3xhhyhsYEuWY8JZ9 knlyAD9DB3hJJqq9KPA27IaASaMpqiKgoq8Q4YiEBZ75kNDhJl+UlHUCTZjYwutl g0QqpjM3nS2ULuoqtWQNTB9J2Q5lOtvho3MRGlPQIihiDCokHxMHEz2D6/9qOzwR OX88LnBoOYz5GeyJJYVQt/WG26ki2iecT3VEkTiCPfmv9WfYMoyhNyqyuHT8vq94 OSzPMy6zYabraTvcvfbSyVaSD6S4wUr2EjN2AiIgjEqSmLTaiHpdn4EM3cByCiP2 OtKyeE1tlHvA6uj+9uVeUZ4uDTiPiH/AsiAQvjx9SGcNcTkPr4BImIYkO9u0MxE= =24E4 -----END PGP SIGNATURE-----