-----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-simpleinvoices_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-simpleinvoices_14.1-1_amd64.tar.gz 88e2fac713fd169271808c900e628acb $ sha1sum debian-8-turnkey-simpleinvoices_14.1-1_amd64.tar.gz 8de80f266e53c98840ca95f02f17d4088cbcb66a -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnuAAoJEIXCXpWhbrlNMhIH/3RGlWnhJ40+e9xVgQz/Qi/6 /dnekETZ8MoFHg3RXkZfXe+DmKx+bMECRttnwb1kCMTmj57JzEgFyLTLwjT1mfJH 3qKT5lPRyOMk42FWHjK81GKUHHYHx6Rd+9ShY2NpUoX4wEbX/vHOp+5ISrpy58EM Z3VrW2MkxBgywcNwArqKWHU2CRH2F+FKpD86YNsXWafw7K+AfEU9xNI5v4U+6zPj POgvj3v82E6HQjnvEb8PA3FkC/UuH0hZDdPiY8k9gKg1ZUBV/UfjjNXip6QkrEmO bql/2klYHsw8JaqSifaAufigtqWBezeZSG/vUhSZHkUsSB2uW9ue3VxXI6dzUdc= =OFUg -----END PGP SIGNATURE-----