-----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-mambo-14.1-jessie-i386.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-mambo-14.1-jessie-i386.iso a8b338119d779b111de85b6320b9d2a9 $ sha1sum turnkey-mambo-14.1-jessie-i386.iso b4f41991f52f43c26b19466698bdd147eb0b64a6 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPyAAoJEIXCXpWhbrlNaz8H/AvfGwJx0tSZIsf9z8xuUgAN Ws4cKBm2hB0I8ylu/egVAWSRL5OJ8ujse6uyuwvmFCD+Wn8GpTszTDpZKau1/gk6 gPEG6TJs2crS/Rwpt7Ua2X0uFKZ9RXEgbdP+P/LAJ7jee1EG5H9fkANQDh5z0uV2 3+1z6qOxBnl7LuW9R9/iH8KaUma0kVmT+kZ+YTtvWQthhHPEwMRDsMuavyyiJkP6 uPiJuYYdVYTlPccZrpn+4YznIc+xV+6ejZoofQxZ4mpo7QkWBJX3SNlG7On78IO4 DUcze55v77GYsL43r7KDnxLea+ROlzkOXo/q7GiaxaIQWb5GAtqcg1bGkBRx9gA= =2vxN -----END PGP SIGNATURE-----