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-phreedom_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 09:49:39 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e0f18c2826cb36961eab2c2eee490cdbae810dfd * md5sum 457c046b8ea1474d41c1b0e28a4efe37 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) iQEcBAABAgAGBQJSXmEsAAoJEIXCXpWhbrlNwfMH/iK0XJ/PWvmb0eLa3GNCt21V 2tQoCr9tKztWF7Z/RwHHzk9jeVilethSWLQL+6qRs1ZOCL08V/jGCTpeaYE3Kned m29AkhVCTz7GCm4i5ux5a53DY8QOF6BKnRt8vM3FM4hMdodGwXR9okri5zWO5KB8 ZYdkmb1I+6MvYexucf13XihgmgklxYGC4vfko+hwSXDAbIrqUV9uO8fOUtJkN2NR /UsQi0m5oX1llIMNCDdvv4r0hSN5WqdKFulc2Ace/czVtScG7XUO6oDTnlAGpsuv 9qJb9BGtGhb5wV9ggR8HfZNBnOjjz5nRPhM7FNJiJSHLb4MCBQsmcO9FT6sukhY= =8kTP -----END PGP SIGNATURE-----