-----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-canvas-14.0-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-canvas-14.0-jessie-amd64.iso ec0bc37456f8249163a80343361c990e $ sha1sum turnkey-canvas-14.0-jessie-amd64.iso 58350f46f4370d65c085b74265118f4de3db505d -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV8YyZAAoJEIXCXpWhbrlNzhQH/joHRIVT2o1TUYK8ByGdJeXT lss6umUKMWEm3qhY+ElQpf77aq46Z6ipum9RtYaHgE1+NH0ihMU+5c+sf5uycHOe s3+XU9G22iwO8NOyVgrPSHSPjlTl8WaxYQytptGuRDS1bjjGhWkj8ONeKSaEzahp q658hhosN6nFiycCifZHopiuLos4yNC3Z42yig2R7d0t5uNjY1G9eYrc4npXZ9UT /KuPqiXNdNll/Uwc/04SeoIYKJ1YtXeMlYRCkcyVebh5De49woR996NjbCVPZRss 78JNRlVDfhlhBZjpp6V1Y1JqvFAFXOI4khBBHThiPrEoamZA7+r2x1mMGSRfHNs= =Pf36 -----END PGP SIGNATURE-----