-----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-openldap-14.0-jessie-amd64.iso.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-openldap-14.0-jessie-amd64.iso f799402f3c06cec2b085d00cc75ee63a $ sha1sum turnkey-openldap-14.0-jessie-amd64.iso e10e02f6ced2c8b573a0a7dfdb38e49aeb8359ac -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrpAAoJEIXCXpWhbrlNHGAIALzfFFer0tzygdneo0H99Glu w3by3RuwTTHZN91STTNL2ALW14BLclsvmawiZAy8uIt5P7RgKOOjpkLcUrkS9Yrs lgx7Dn1wZ/YeP9Yb0fP260Ewx4EgGoQi+Rv5Uj8UeEHwkITD8NXzaa6odZWA6VPd JL5iu5wun7zyl6X9vzeZ24xYjeTd0G8tr7vykcFKuB2JTY2yegXZZBaOru8mfCEB WQhRrCecFPSS998Hie5YPEmvfG3xgBNCvmQveZ3kn/m2DtAqiPrfwOmLiahsGm0H kajiuf6WabRZiVKy85FhCLBS65h1yaSBNMgZ+kykJSewyjmtfz9HT8pQPHxxSP8= =4x77 -----END PGP SIGNATURE-----