-----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-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-jenkins-14.0-jessie-amd64-xen.tar.bz2 426becf2b098905748d71ef2c40678d4 $ sha1sum turnkey-jenkins-14.0-jessie-amd64-xen.tar.bz2 ef5249feb9e92f63c7db3e56987407783e5be7f6 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWVyWqAAoJEIXCXpWhbrlNPLQH/1SWRcnO3zpCQHCE2H5AXohs d0aHhxGYHxx0g85JkLMxmODT/m/omR9+7DmKme+1x2ZSqgxgxcCDEnMCyBWCsYSP V1y6O4UF6H0uxUqCnjulP/gHJWuyBMx6wYaDwSeudHBI0TWWIWp5yRb8HlEz1GK0 X5+2SPgUEgPUS/Rw2TheBwVFo54M4tTW+0WZrSKjgSXT/RZbfFKCzMHOHtuBF4EA 4HPd4w79i+kX5jd/pvYlZBVuT1kMjih40G5fFra+K+A6u4VCd62sgQLSBfSVDpO8 qigVSwe68lF2VqJf9eD6TQi8/wIQpfS5YmiS2C4EbIBvHMRxQIV/jgML5lWwed8= =M2f3 -----END PGP SIGNATURE-----