-----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-14.1-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-14.1-jessie-amd64-xen.tar.bz2 7cc1ad22705d8f36e19039c053dbbc33 $ sha1sum turnkey-jenkins-14.1-jessie-amd64-xen.tar.bz2 0b5de9f6f7d94392ffc78e02227df454662a26ae -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnzAAoJEIXCXpWhbrlNqgIH/jo/GvlGf7h30t6n0W2uJvOP DiBLyMGfnFXkj1wZGcUSNroKONDfyUlrWriVJ06JESVUNKceooEuFy8txBzlrgg1 PEIFJ3ZzZia048LHgM15RoaMZguTygIwxGUSEywtl+B+KYNsPxf9B8aVz2RY33w6 IomorUXzk75GxpM/y4OT7Glfd6F3dkcvjNlxk/jEQ+AbNXrudprFGEjxoQYttILF IWGY8ctgMEiQKlCKlZE0iRhoxikczFc4bk+QNouH6NjE1+FlzYW8UwGJqC0Bp7xC TmK8bi+PsBmAZI6Q12Kq8jFcPfSK/fpze/HtpXjjIMFy/rH1zp2okIxnDQ0hSzU= =JMae -----END PGP SIGNATURE-----