-----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.ova.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.ova 3a67fc8bf6a71fd6a52198310f6da09c $ sha1sum turnkey-gnusocial-14.0-jessie-amd64.ova 1656fd3a558993a55b835d18d1cd2e0d81914afa -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMJdWAAoJEIXCXpWhbrlN0gQH/iO1gV06gRESOQhvayxpZ2yM ED4CrSz5cHMKpx9ow8+TIE2KCnQIkzhp5xpBAEm/FFbMJJ2wSf5WG82lUHKGv3yY OJS0FpfqELfNr1rzTvrzu6Hq3UlJEerdyUke2vvlDmwUM69edHOC28T/f7EFcyjw EcZtdZSZVFJpWOHvvvP7dh4VfF2aep/BBd9cojjwYwPJBohcfdIuexeK5Zcig/W6 oztdu5DWgRvhQm/ZtgtiZI7aQS6olZLUplSbMvcmgew8Ricoo8It6OEwlwCq13iI 3v8ZEx+mBTB7/JivysXa5pusVcoProi4sbQQSH4KuNsq71hHty35zDxzvoh0pIQ= =2ykM -----END PGP SIGNATURE-----