-----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-phreebooks-14.0-jessie-amd64-openstack.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 turnkey-phreebooks-14.0-jessie-amd64-openstack.tar.gz 304f6d3a3b873fe8b4c6087ebe66a7c8 $ sha1sum turnkey-phreebooks-14.0-jessie-amd64-openstack.tar.gz fcffd242e1f6c3f336a6fb721fef647ed463dc60 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWXYG+AAoJEIXCXpWhbrlNaiEH/33z+QzunszMjCjF5nprXDyM dcO1F/+tWOkZOc+QzSKACHPAgy5oeanG47RU/jZrLz0MI7xLhDMRXMoVA0yclCYo 91fj0UeSyMMwa5cH/SMgn+qtFcDQyRtHoy/J8ewFDdDzmYcKgnQLJvpU6qwA5Vvq coCG2c2gwMm0c3s3lyhZOZVYQZpRS2Ab0ArTRFSlVJddIu+Nso8YTPZg7XwMtzyo bIla7+/RCRoSHivcqydwpFz+qksr2fagQRPslP+5ArZ6kHvYiqclPOtR1bRwTspq 8rMo+H4Trf6qn2Yr2nS/BJc/9TYnToK6qwShVslj4fiQ7F7ICdw14YuUWWUAS+8= =6fLZ -----END PGP SIGNATURE-----