-----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-processmaker-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-processmaker-14.1-jessie-amd64.iso b6fd27aab52c59b70421fca7381ce71a $ sha1sum turnkey-processmaker-14.1-jessie-amd64.iso ef151117740caad73838815789fc08e32a25ba4b -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPzAAoJEIXCXpWhbrlNDR0IANWklqFiTBVizVW20jARsmlp 7MARQlxZudkG8K/2yKdE9+VcVz1kvu18QCtLLGaP9AulJCGjNYKdVv+nLPSqAPWJ 3mEJCRw+ZSXPuJUAq7AkekoRpe1zY/jUFKjhStS4qSWohmG2a0B2RTbnrnNO79qi tQtL/Ic4WdZCWDCvipuLswejsxNbKVcJ2dgRM7h8sxqg5rYwF3LQXM7kPySTCxYO JhwHX1HB/nRPDArDnHhQlkQGM0vRd3a8pv0n0cT0Gno/Mz5OWMMLgVDVyCR683rn a5r8G4cRXR+ifSyYzhI3hg08IPrkEGhm3NmD/RA9ihLaM5PJ8qbxTDoRfoxAVdE= =xXfH -----END PGP SIGNATURE-----