This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --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-7-turnkey-typo3_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 10:43:54 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 229d11635072a0baece74c943887dc2385fcc0f6 * md5sum 7d103f21111b8884b49b34bc9a5274e0 You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXm3hAAoJEIXCXpWhbrlNeqgH/0J9UhgErapj3LwOdx5e5Aae DM8zYtYameNL/+BN7g/DxzV4/Mft02epbtzF3KHRaZ0CNxrrtrJZP5LV+V8o4gjU 1G+kqdTZzmnVXilY3wM9zktJ/V1rO6AAb8w5wSO8NvBWkczzSB9/BsyFyPtWcgEk unbFe8CoJzQAjIdwAjf/1VF59Y+VVIiQIoVvB35JQJ7vLXVqimgBZ0cJckb7VOtM JzeeQgLQ/+5eaK0v7w4dsJYcymT8xbn5GeKvL/JC9Hv+8JEM3TN/D5OvstGvvJPJ SSgoS42oIbdIHWxvsKJhGT2jenq977fHUidU9wp/zUBirsCio00vIKLWdPzvFxI= =pQDa -----END PGP SIGNATURE-----