-----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-14.1-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-14.1-jessie-amd64.iso 60be9dd2e4e5aad0781e596ffa39728b $ sha1sum turnkey-openldap-14.1-jessie-amd64.iso 241cb9d5fd6d37b5a20664adb181d21181da8f7c -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPzAAoJEIXCXpWhbrlNQaEH/3KqHftLNVeQRLx/dsQKnmR8 KyWv6/zMX9BGvVZeRe5RPCkgRzgP3Zpt5C5hFMnBSxOOiXVZ3v5bucucqZ96iLfm b2v/2xdX+V0/lpCyvWz+KWh8iBCY17a/0jjnnw9EaTm3iC+9MLNUSj+WiqGmdCjV yLuXqx2alAajDMzOfXSlo1YqwKvQdCbDj97a4NBj43lXMV855GkYVCVxzMOFHfe9 L4fVIOwocx3AC4IBsruprtOrhftwurRzk+gvdkKehtH5xGGz27J4HcCIee2iIBqg 2lHbFpUGwmXoxCrSFStUa1ou7nq+wzdWszpgedcFBOLBUTtmKJhGBseUyytE1wo= =oyyB -----END PGP SIGNATURE-----