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-openphoto_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 09:33:57 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e2e6a35c1ecf5a6ba0440f4426239f7eb97c3dc6 * md5sum cbb90aa12d1560f0073d8b88b98a8c9f 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) iQEcBAABAgAGBQJSXl19AAoJEIXCXpWhbrlNonkIAOpwOkrJ/1Hr+ROyBzDqqOsR iG4ywidrxBJvfeYpSe8z58KDkiYMwML6zqLQMH39dOrBp1Z+Pa5HUPyugjUdqskD NLcs7aLVvxWo7CdTwQ6Qwjpn479pBRC/S+MCAAcrz1+eCH9nipL4bdx7jjofKLxX OWBhskZEiUd4btOMj1QEVOSWVekj6JFHkwtaUNHLdICSmjQkL1IOY7qyZbUz4DSM YPtc0DEXDhTKl86FEJsgzGKVkqld+sWC7wgvCJJd6bADZbaTFSsS2uHWrahCJiA7 r0888eBuleTS8Abr6KtVC9pknhdm2P83Q4JG+hGsDjLelulFdHC+805ofnDkhTI= =ck5p -----END PGP SIGNATURE-----