-----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-web2py-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-web2py-14.0-jessie-amd64.iso 7c816bcd7b1b197c6cc03dbdd5fc3acd $ sha1sum turnkey-web2py-14.0-jessie-amd64.iso 8db0712d08cff93ca646e0aef57e9af7ff8219bf -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrrAAoJEIXCXpWhbrlNrJsH/AyUJaNxjqrhV1i2bQdr44gO sNkbtdrZ+wR+dt2TPlNIzObBFQiuN82fcEYA/0o90k5yXRZUtt5SllazqJk6FLk6 9xtTIKisdYux++cdBKmE05ucb1lUjdhVk1tn42/mJONSagKRx+pNgCBZlaTuq2EV BCDvqVSl8waoJI+baPbhsVtYvp84KzUxGVOgRf7C9QYm19NzxniRal09SwVimH5l m19OQtJxnjNqqv9YBEeutBZZmFaT39j757S/7SUZUp4UIiHZdL+aKChJ4dA+ZkGY n6bg9P81EVu+wM6nimkzfQnic//3h72SYUYFyFRan+EeVAMS/D0mc3sYd05nIcI= =l/Bj -----END PGP SIGNATURE-----