-----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 debian-8-turnkey-phpbb_14.1-1_amd64.tar.gz.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 debian-8-turnkey-phpbb_14.1-1_amd64.tar.gz f7c751c48f1e6e0555651f0077b69a3d $ sha1sum debian-8-turnkey-phpbb_14.1-1_amd64.tar.gz d4a55a0a964b8133e2c86f52ebedf9e018fe41ba -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJntAAoJEIXCXpWhbrlNYfwIAKLfm60qX+tt1uDAhgDmLclp enZfqyxaocPVt+4fMK9fCezYv5U1TMIvq1qvh1IrxVaGP5jbUAq3LbsWvLCFC0yD Tz+Sn6gOhiszsaqZKC/nd7TFE11jeqxH/Tmn9E7R3majgTiC16wJtQqKrk98M8lf 1EF37Z5bEXbiHYqnt9VuZDNS+Zj5YFDcFnY4BR4wFm1AB93Ih1O9jXej5Td3j4wy sb0o4X2T1JWgxqtuUlpK8Ug9QhhwSvDZr+67wP2mQdcn1/mTq7rt6MjUklI7BUBk /LxyylHbVa1+P2x4GL6ck36ikDzAavRNdJ8Z51VC5HbRPyuFoBeH+6QXgbsuw/k= =QTsh -----END PGP SIGNATURE-----