-----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-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-tomcat-14.1-jessie-i386.iso f45687b3ddd4df76563d28d3c5aa315d $ sha1sum turnkey-tomcat-14.1-jessie-i386.iso fbc673a4f12400ee0a338a6d0ea2beb938e75d36 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP0AAoJEIXCXpWhbrlNfHoH/1oZqBuG33twBudcHbVcv0ry GnkpgfXM07RYq2W/9OnEPT+r6CG2aG175J17DGWCXM166TxKTNaMehPlnWoL6LAH HCffcxnx1VAeVxThdKp25vOVFXhaf8ZyUBQVDvcAg1QdFWxsc0GUrWZVwoWXZ5OC EBhKZO8WuYtXGISu3evD2MrgoXOOaQf15c3FUwIST7uZbcQUdAkmGKhVmHuuRcMb pG3X6pqf0XHF7Yb/aseBkX12Z62HxgxJgr6On1wXVKF1EGojih4FSA6GYqfWgO7O CV6bH1GpeO56QUOeI7H0OjhceIzz2rv8K7beisSqk/HslUD1hG+68Gl2us8Oue4= =TETF -----END PGP SIGNATURE-----