-----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-14.0-jessie-amd64.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-14.0-jessie-amd64.iso 4c2914e55d480644b5af88284237d2ab $ sha1sum turnkey-tomcat-14.0-jessie-amd64.iso d2da5d9b205b46b5ec4cf4f88f43541423997477 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrqAAoJEIXCXpWhbrlNBKQIAIXKY7tnAUJf9Mq5lj3V/6yI 8WCSzLbsNrNdp1eB00JumuFHoHvoFQvajCrVvVnYLc73BjbiXS+ydrHNEq6eYm4R TG3pgsSnh3RvDini7dP2r812jUXrlzZzdQR260clwlP0/1fJnTqeOiBjuKDYmvPG rEBE32jjZCT5T+QttEc8lK96bC87dygfU7hwLU+Yp8u5/8TmSbuGnpf7AqJ0Qfsr Mg1S+3a2CltpBT5+4XM3dKbV839c0dXndhCLuUSLLDWMNL4CyxSszlCakEorDUVY qefJCErODSwFJrIx22/StspS1Y4T3M2YrMKK4wkIMKGPAuqRuO1Tok6RDsKk1iY= =fmf3 -----END PGP SIGNATURE-----