-----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-rails-14.0-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-rails-14.0-jessie-amd64-xen.tar.bz2 b745940f65222faa295a6368eb34c563 $ sha1sum turnkey-rails-14.0-jessie-amd64-xen.tar.bz2 a3958c8ab22dc6359af3ace291f0aae76b809e6e -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMdiCAAoJEIXCXpWhbrlNsusH/0HnX1sv/1XASE7dcMCDUvMM emQTMPcrHWTmoqrdkhoNsycR25p+9qjIVXs4AtH9mwMVIjP8b9PTVtSM52vREVyF G/rBy3WXkfA3LB+Q0zoD2I8tCFmw8h/QzZb0nuMLw8+Rz5svz/yVLMIIwyzo79b0 s6Z78jN0zKhwSJdBF0VpLRNX12K/spLEb3GTUwyT9ohrV7HjD3IwQHQyfCm7V0WM o9REx3tCk9mQytkDngluxXWTR1460309heRpieXAs6CmAJmRVSbgiqGVTPHs/QeD CVIdLCst5k/LsR/RpccMP4GpcKpswpZ5KNNewZ5U2+x4CyIfKevsau2kclFd/Ho= =GJ67 -----END PGP SIGNATURE-----