-----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-gnusocial-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-gnusocial-14.0-jessie-amd64-openstack.tar.gz a5d15bf9cc01c9c2d8416352c3f91d1e $ sha1sum turnkey-gnusocial-14.0-jessie-amd64-openstack.tar.gz fff01e9d1a85739f405267876321906c2b0e268c -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWXYG9AAoJEIXCXpWhbrlNGVoIAM1OZoxNBAm53gBOW47VgFGp MDYY1Ro8qY8kgEJmp84r/MkZkRQoRcT8+Qcv4dq7kBNdqNDdTvwV7JI3Ny8iHuwE Ag+Skn0i0svTr1ByMIP3eYwWr0xAAPWTTzlGg382KwAEGi010duW4lj8JteWPgYo sX1Rj2RaMXFb/6wDZsRiJqh3hqIoTittMmAR4yI99rhqTaBzEfc3YWQvh2GZZWcs TmjJ07t1i130uo6Fk9+0MzpV7HxmnZ8j143Adaxx+RZm4IWM3GV2/U7cB8z9vp8X F/OYW+2jkf5fYVlx13HWHoBxJx6GuRy9AdcWgpaE4FbYzJHZUc/R1JHe6NSowqs= =K0H7 -----END PGP SIGNATURE-----