-----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-canvas-14.1-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-canvas-14.1-jessie-amd64.iso 9b685e5440821fe1f254ed9eda9e6d94 $ sha1sum turnkey-canvas-14.1-jessie-amd64.iso 8e8577030538c97d59af27ad0b4aa4cd2c094b71 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXRb5mAAoJEIXCXpWhbrlN6wUH/2hJ5K28yjuKFy4DjFengZ+L oGnbLMK4A327gJiGdUYvRUugbd1FgSCMVOgQEUIvnM24X/1Yh4DLE7svDhUUYfsD FOta+VuNETNig4vpIKmJbMcpY4Bmj6OL7xWxmCugPB8mdpRF32LqkON2AdulznvV 0NAr6w/P3ziblsrK2GsPZZfMHFM0ZkfpmKj51ridNbMwfG8sBMOmETd1G4N8VFNj HT1Qdv0VKsjoLmEXk8OBJu7zXek3c3mDZ0WHy7J/SiGnRCKIgHvwOsN5qng1gxrk +rQBsuR2QZ7cOd1mrIa01skNqoXcs4X5Cjq7HSsdQz1vO1iCFSatm8LQZHII/dw= =ioqI -----END PGP SIGNATURE-----