-----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-tomcat-14.1-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-tomcat-14.1-jessie-amd64-xen.tar.bz2 5cc402efb51c77d0d718a2ac26992f0e $ sha1sum turnkey-tomcat-14.1-jessie-amd64-xen.tar.bz2 adef060e6fe313fbcd198b38fd6daffe6788b5bd -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJn7AAoJEIXCXpWhbrlNt7EIAJTw3u6H8B5dgSNk6MqDV+oK pOzuHi8Y5lg78Xbz714Od7Coec9gseEkdbz+BQxHl5QxyqW5aj8lfvr3305Tla8C m9VBMxQzzlliIRoGdGuAm26ispRBVBEodPdooRTFOH3ixVyUCWoC2mMK4PXYtfJ6 KxwOdHxzPKVadIgPfl4zlCDYlsd78PFtOBtI0pK/f9JA3fvmec6srian/6vqMAm1 WgfAdNNn/KX6ZEBugZf5R3SmkYXVSdyBWwsBzL5VgGxmf+ic4529d/C8GgEWpK1o NSE90EZ2MpwzWIJ86Lpn8pk6mF2cqBK2ZEvnPHBnQDtyrbnVUbnG4RhCbZk74+4= =YRof -----END PGP SIGNATURE-----