-----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-typo3-14.1-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-typo3-14.1-jessie-i386.iso 797bcd71a80cded773ad1a1702851a60 $ sha1sum turnkey-typo3-14.1-jessie-i386.iso 1837aae1035ccf9c779952fb3f5eeadec1ff3f4f -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP1AAoJEIXCXpWhbrlNuGgH/iHdSR8fNWK3FkUONFn7oebP ksGDxQMFNII5oT6sNVvqzB11B13QnMtk3CnU+1fs+5YZ+Ubr4uHByAUZ1PZbBRL/ yRPFGFQQIkyxI11MgfXnDuKUv5I0WQRkH/7oApMkYlL4A4sbcSsnu3r5q7cP9WnZ JGiepr2dFnxvhPYza4iC7+uTG6Ohyk92FdFK+80SThfDhl5GKJEHA9HeTNjbu194 Jxtt2r3/aWuIx7edRp8lZBx4/YTgXYf5UVMB23RdA7GQh73OlqsA59hNrb5Tvr7r h9Szkn8dW9AmGrdWnm0UtLdlpbQFyRiHe4N4DeFirdMsoPC0UKuMKTZYPx46HVU= =JqzX -----END PGP SIGNATURE-----