-----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-trac-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-trac-14.0-jessie-amd64-xen.tar.bz2 45c7c985ea4222b4edbb89b05e0968f9 $ sha1sum turnkey-trac-14.0-jessie-amd64-xen.tar.bz2 b7efdc0c39aeddf16af54f91b046cb00f3cfb233 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWTDfJAAoJEIXCXpWhbrlNSFsH/iHu+2k9vLYixVyLGOakp4Xq b+RmR8v5F7T0qBGd1sy3/J5EPih27nj38SHhSbKDcv+1Lv9cHQWIyOUk9BDP0EGp Xjqm4s0jT/zb1u/HZbqm3Xnp3kGSdGF2tE+OBKdMuupmHNmpbpORozZeXrcBmM9k jbeRgTL4eESWWWfYAkgHhVHQQCqgCUuIO2EeoiRD1++Qf2AMjpjICRdxysJ6CAB6 7xIa8kfrZHbMgVkcHz/ajQR5eotMGdidclhgJ8wNGrQgd7XgMkXeU1ihj0MfzV6k /1tGxSkYo35wLBa9TC4xa+Q1Dl/Eu9h/ww6Zwki29v8vUOt8RQUxccTNAgh1+R8= =GkTe -----END PGP SIGNATURE-----