-----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-i386.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-14.1-jessie-i386.iso 6ba4c5c43e70d3bd7aa761bbc794549d $ sha1sum turnkey-jenkins-14.1-jessie-i386.iso 704d807fd147cfbd6a78579c08fa40b1e9750570 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPyAAoJEIXCXpWhbrlNPMgH/j0QMcgC5lZQ87I9RJOlw5PN 3Kmgk6bU8x3icw7uYZUxgMv5VUP6gC8xXxZuotSTREKa56eJnY9TRJE0Zs7MM7ST VSuyuTtsy1lC0NZQUB1RpIbJrYaBjM6PT3MktupusLBJt1JQW41Wg0NsIgi7b5l3 wmEN7RArz73U5dgts9CYZQ1V3MiVQZULFhNVoibErgqoGIdBOr/ud9Jo9IAweOgI IZH4MFQx/y6eAY/cnOtwMCgukkaL0Cs6OCoVBC9RFMb4+jUTuARjZ9KzllePNrTt NsxNLN7xD0DuMyxfyPwQyj9t75oXi6Tfg63kMD/ZNt87weeqjA6DAi4vMdN/GBM= =5xS0 -----END PGP SIGNATURE-----