-----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-mediaserver-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-mediaserver-14.1-jessie-amd64.iso d55c7c29729a7283325c33246aa536f2 $ sha1sum turnkey-mediaserver-14.1-jessie-amd64.iso 66d0b5a3ed70cec1d228aae8026cfbad70de8052 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPyAAoJEIXCXpWhbrlNfhAH+wWq+MKiSKuaiZj+OftOraOc s2XyGRScvuisUGuOMSNQNvcIUCYSu8mv5Z6cAfAXfdwJEKHdfrZBaYKagHG2X6V4 ietV6Y/ABwtDm6LrZvgMlpA0Rluvz+kiZL1VxkxewE+CZCp9DAAEl2eNYny7Fft8 MvyfanBPX3lJANpkSJWjlqnDJk6tjWZZlum/SHVFl+6LoX4Q3EPiaEGxoaCtSWuz oeXrq6Gy6esDW1mi2k6JTYXdjAKA3wgCw3122ZRr3SCppOqes/qxqBPf4WdDTEsg o5UIg6Xasa7w2ys3wsVjEu9RvUFfGDiLyhbhJh3V9nJsnmPsPc+9DRHRvYzln9o= =USlZ -----END PGP SIGNATURE-----