-----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-sitracker-14.0-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-sitracker-14.0-jessie-amd64-xen.tar.bz2 5f15ea3382a86baa3a15457fa5b7a439 $ sha1sum turnkey-sitracker-14.0-jessie-amd64-xen.tar.bz2 634a4006534b85f63f8fcb6a16cf95edc38ab576 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMdiCAAoJEIXCXpWhbrlNynwIAKWaR4dO4J96Nrs67lM/BciR YWWxO4p1UMvbzi7xRxi5c/+QZ1UZatdVsRYJBotwjbGEuiFzk0/G7ymQiciSgLln FqabKDQMVcFvqyFagDKJ2JKjlfbG+A02STuKgWx43ZJGLwMfhYTpMHIJLSIZwtrL Jr61Jz216S4l5wmQSrKSal7gtCdBhYeb16M7xN6ji1jyxh10G4GDaKbiCh+2w8Qa WMUwfg6E/wWREBFh2ER2bWIj3k/BIK3IDxPNGTEFWsmMjWrQGrlr/Z/XFmKb9Vly XApwsulfzhMT8Cqq6r38H1/MYHHPhd2ItFYqReWvgrbbPtFiEcYBnWV1DN/83lk= =MaCG -----END PGP SIGNATURE-----