-----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 debian-8-turnkey-concrete5_14.1-1_amd64.tar.gz.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 debian-8-turnkey-concrete5_14.1-1_amd64.tar.gz f4adffaa881b45fef3fc4288756f76cf $ sha1sum debian-8-turnkey-concrete5_14.1-1_amd64.tar.gz a34ca45e3e280b6b51c1a8fb0e25274f17e970b9 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnqAAoJEIXCXpWhbrlNmRcIAOia0h2oh2cCjz61ghhzL9XQ iwJ19AVcVhBCmnvtc19u/OcLmcuaOFVIStZn4xWgIgPGMaVh4ZB25ONxh/hpZxGV 8V1p0e7P6YsLf6igDCtEYrFDCGDmIXldMSfRgmXoeQUqDiYsmeng5K2Uej4t4Sub p4NbNaiwa3BwY6o0oeq7zK/zNi+k7deC+BEg8k+2ueLA8+e+WZrBN9gSt88YJWGA TcSFVbFpZr02I529OqRp8wp6GyyKNzafm/3DRkUQBvhShQzzu+sI1ThbbUyOHPhB oo8nti2kLt46ZRFVQdXDHnMHet4o+S36hALaMAIHBgLbcEz8IKcoefRpKncspOE= =xKXV -----END PGP SIGNATURE-----