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-tomatocart_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 10:31:14 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 4f4b8d9c33aaaa697faf4d725d9d8dcc3795f01e * md5sum b6143e5ebbb6833fe287e4bfb100f30b 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) iQEcBAABAgAGBQJSXmrrAAoJEIXCXpWhbrlNfywIAM77nuTlL7+M0iauuUNpFIQm UbZegUjNgJNH51yjObsHHNm1asSep8HWQEaet1oGRro6AN80/SRRmPgDP1z0RjWR cz+k0XV89Z5PvsVTCqqyhKlJDpgpHMOPfyDSOXueHeQqDF4YB91pcx7/8qSVcCbl veVX2B3yiH6u5/GFPmS4HSMCBpkC8t7L1G1gRFVZyDzRT55ILmwYtpLYNnHKRRVr mO6fbb2CvoLzUXpFQoKibdCn1vucqYfDbZtN+WMywcYntiFVzf0gU4pvibFPfODQ MpHpwoGlZZ5YbAHNktaDBnhISh3c5BAwR2XVQeuIcmcpEp5Y3bdGGm2AWhe3UmA= =hVyP -----END PGP SIGNATURE-----