-----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.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-amd64.iso 1e314d8b4bb2ed6f3aceb177f9adaa6f $ sha1sum turnkey-jenkins-14.1-jessie-amd64.iso 392d338c16262fef61a271e270771adfa4ebf980 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPyAAoJEIXCXpWhbrlN1GsH+gIeVBLh6fySGfibp1/c1k+Z SbrjFnTAqL6/ij2nDKE4sZW2lUchrfePaEwdaUWsGSERjnS3toOVY0x0AdDEwHcO gF2+5sJqRiwT2APYNaqhyzG47GdG+REs/p+SpkwGhZgstAhHmVgzpOHG7Pzrv+xy UL/14kDmaGGfcMA2agGQyerT2pmDRmM+lYHmFO4vjlrvHPHrRQKHg9Vv6j48remt vg5PnI4yi0CwsZmF66TmiaCnL5hwbl0Cz+qfD5MBOwJw1q3VquME6xBAyWWVvHN9 Fdvzm8ir9i5IFQMqlEkLd7sSkpXpI9Qu21cpQzogh8zTRzd+Ufa2bQ9l/ygLoZ8= =qTdg -----END PGP SIGNATURE-----