-----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 debian-8-turnkey-rails_14.1-1_amd64.tar.gz.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 debian-8-turnkey-rails_14.1-1_amd64.tar.gz 685d8b1e216c94c66432a04072dd69bf $ sha1sum debian-8-turnkey-rails_14.1-1_amd64.tar.gz e2ca9e663211761f3f5435d2f56206d126eaac3a -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnuAAoJEIXCXpWhbrlNrE8H/0NL0J32iq5INa8GfO9syAEI sOVEceD6Ypjr4BmO4uZE+JTVc/Ents769cvy56jFVyFErQRdsGk2vBpz1k9wKQZD bzDHMEOj4UhZMhlLI5mJKMuI8bZCKIkhCTauWkglMemqstTZl2lQZCA7lT7OcBps Lp71rOJxYAmme8HskU8jtBiMq2HW+x/0SEXADTS40jaLCyASdwPTVzNeWA23QCAx 3fVynixqkivIbY3T+UOWjHyNWE2D51yKF+frsg9UkqEikJ9FeQCIxUvgGtKVlVwa j7uTIAZEexr2+infQWOhBQjuVOI7LmrGFECkyeEiiH4lMKJk38lb0rwAyf804Dk= =4U6t -----END PGP SIGNATURE-----