-----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-jenkins-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-jenkins-14.0-jessie-amd64.iso 6f9c2f672d8dcd775aeb4eb60ca5059e $ sha1sum turnkey-jenkins-14.0-jessie-amd64.iso 978144e8fd7d0fc27c581b71288df52f6a2573b8 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWVyWqAAoJEIXCXpWhbrlNNBsIALE/pCknD3XpzAK/pFaBR4sA cP7/qWdbmXbBck595UWR/zhPMMsDGW5Hu3Oj8i7LywnaZMOffR6uaKhFR1r5y47L A+W5xoFSw8k3UuBTfERHt9rPytYYmaLA2V0QZjUYAbROClL6gE8ESQ+31Sn1Yk9f xUjSdZWLg1I4WLMgrZQUzJrYc4c9heuK6DP9ydvKQ6KZDhsxIhWm9+TtP7s7raLF Jb9UaJVFybxQQ02WNVGVZfY1j7PsZoVgfMJ7cF/mUGHLcGjRHIHceZ82/xWCsLlr ZjoZzV5ZzLg3TtYuSTXuSxRormRWLPBj4Hh2dj465eWNoFLG2/Pz94ZMomNXVBg= =xmcC -----END PGP SIGNATURE-----