-----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-i386.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-b2evolution-14.1-jessie-i386.iso 3cee9e52fbf0719708d0bed08ef06fae $ sha1sum turnkey-b2evolution-14.1-jessie-i386.iso 7e94941a6627c5cb4ff2c07b24d4043cd173645f -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPwAAoJEIXCXpWhbrlNlEkIAJImvx8OMkpT4dLlZ83JEUJD QWRoEbyvDWeI0WdvU9WvEpW2zbPosAhFQu4627bv01G7G1xc0xF9PSLS5u70+/OA S4lTBEUivtlYiD+zggdR2zRtuGfBoU3pISXBze6mlnQXeKr+lLfbguSBeWFjTTEj 4FO6OnHka3nt/g/MxEeeD5tmUH/HouyMyc6O3oxkFwsCBtS0Yxa5Ds/pRjh4gUEd kNRzRd+R6wIHro0TIvUsQ0b0qHnjOn01OGVVI5p1KAMyCZrFUgMCiW9q0WY2Qy6/ Ap7DJuE9ladlYgOuZ6Y4QQY0VJchmn2P5zPz1kFctNQAp2KrSe4qjIYz5m48EZE= =3/oK -----END PGP SIGNATURE-----