-----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-mibew-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-mibew-14.1-jessie-amd64.iso c11ceb8bd0c944fb8ea6ee70da8b04a8 $ sha1sum turnkey-mibew-14.1-jessie-amd64.iso 15fb4a2219259db7cc2532c5de693f625adf077a -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPyAAoJEIXCXpWhbrlN+tMH+gIm+MyoYAdizRMrhoB4X355 AuASkyFYU3ASM3vHlGo5NAcdJpU07ihIex7hEbvhl38PKv1etQrUk21qAj1Q/4UT fp9ba3zNCTh6HLzdY/iwpzX8/owvMpwuoIQOgr5xq+TcQoEQB5eWh28LDXZyC+iT o6YzQq5p16HqUdfz8x4b5BEfYm0TCLr1SS0znjsF6+AocSI9XbIkrDDIWDqV99iz BscdcpCWt+vFy+dGhIkEHRrCfhoHF5YfunsYTZIUd5/6K3JvUUeuigo6hDrlGM+n zDVQgyImKcTS8leFReSaAC5TWtuMSinOBULmPOTKvanweL/1puJIUMhbveI29pQ= =X/gG -----END PGP SIGNATURE-----