-----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-simplemachines-14.0-jessie-amd64-xen.tar.bz2.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-simplemachines-14.0-jessie-amd64-xen.tar.bz2 b1aa30e791ce91f4da83652239ff449c $ sha1sum turnkey-simplemachines-14.0-jessie-amd64-xen.tar.bz2 f37bd73254509f64a6bfd9eaf8ba61879ab0e3a5 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMdiCAAoJEIXCXpWhbrlNm08IAN3ArcndxsijjtOq06Lwal4K kA9W+qBhQPlt/3qisvzBRfqqiz2/EAF2PqLPYHgHbG3xn67y0Unk8ca59T/PJWQM ZKXhgnSt0+bUtbxM8aSoSn4MiIiYOdSOGnCOrXq3pB2DG2kbP9+9ItYuNhzeCBna s5q0tOWKeJTMQiZRWBSxTL2YdXiNJLW9Ywhodt7j27IFnGcdl1oNM8MmVmRaBZQg uiPSjWXlTj0h40fZHYrKzENULl8wycRTG2HgnoGNV0k9sEUv4/D4Kn2PVQaLWa05 k3CteqW98jn2PeGjuX8bOkXv6vZdzJ0rZSjdXEUlwqFJoctG0kEN9Q259/6qzhM= =2P03 -----END PGP SIGNATURE-----