-----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_14.0-1_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_14.0-1_amd64.tar.gz 97b0dc5761843a5b96d6fcfe112589e5 $ sha1sum debian-8-turnkey-rails_14.0-1_amd64.tar.gz 6c1b405d424ca34b2f4de03ac52ae08e312e6fb6 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWObxVAAoJEIXCXpWhbrlNPxwIAKf05CQuivsXceqFIa8S2eQM H3fSSoLNECI/3V01FHSforxyuPzDyOFc4nHszM1aLHPCAG1dYHUazB+4Hu2k5rT4 TGFuyEeQXa08mfu3HvFZj+WudmsxggodUMXK0oMhR4xHR8yrFAJ9iEl4PIQcrvgI 9JNZdW/Xv7X05Egcouq8wA0OfJiAnzYcKoAdaBRZnp8ZQ+Qgh7LUP6dwtAlQlbad 8bVpGpQlbaJd6xRJD4cRGgdenP6UQgL5WoM+x8RG0WMF6xxdCN9pnH3KOWu5jrUu EDellsMHxGifvhlNXmWsEwhfnUe3qr4C37ir6XjREkPD9ywtVaN+LW6NKPAXXAU= =ikeK -----END PGP SIGNATURE-----