-----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-punbb_14.0-1_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-punbb_14.0-1_amd64.tar.gz ac52ed1fb99cf5ac26089d546db4b53e $ sha1sum debian-8-turnkey-punbb_14.0-1_amd64.tar.gz a83ec98bd5d1caf196e0090630d7e3058f885808 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWObxVAAoJEIXCXpWhbrlNV/EH/Awp/tUKz4NWgVTIQHRfqY85 P0z+2OXkHzSRzkRrvYKs1MVfVZmpjCbVTGjBZ1gYN/x5vXfj6kJtbDH7wu3yQ5d0 ZDWTu2Bbx/e7MW1mL3W2o1batxuQIFN+zwINnmOfl+fMWIZoi0NQim3wMfCLRTd7 zVKUgW37FgmoNgC3Oer2/DlcyJsZVXLheaMUu5+rVqn5UPc0G80pAG9YwASkMfG8 3wVtYgPaLkeKIWaEWpXbBTeKt9ZqvMI5V8wUvPgxGeid3vZEKxKG0Iz+8YChH/Ju d+NOJL9thMoOlS/XmvKOK5O428+yjGsd7CFU2Q1vmGDsacnigQ6Q5ToyP2OmwYE= =sioJ -----END PGP SIGNATURE-----