-----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-vtiger-14.0-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-vtiger-14.0-jessie-amd64.iso 051090e5764d02198b5792f2068e879f $ sha1sum turnkey-vtiger-14.0-jessie-amd64.iso fe9d486201c55e12f5abf22dd1159c04cf2c4d89 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrrAAoJEIXCXpWhbrlNZHwIAMGnERyuFmii5a7ag7N/tcQ2 WxgA59Ve03Qayv0AVXLGRFYB9ztDHSgXKzMY1223PUUc6WJgO1GB15pgVsQMDLvE cEIDH0gBkhSAC+T1wjhmgdivokBsWZqUqfjinjtIveW5ZFLlfBi21ubQ+gPwTLLS KLke7V+kIvLr+uk6hu3B7MMghZGOOynXRrchYZlEydLlVRn6JSq2RtHNh1VgL2p+ ZbGnVFLM3Bi8wDhE6/azVdCjTcOS8eBmGIK/vFenpG3GIobuJgIYswFp2MJhhyyj NgwfbikFFldMIterpreO602OWjhiX5iDFeMMsen+AQAmLDy5Pe25cjqZ8Dxi/ZI= =ZVj5 -----END PGP SIGNATURE-----