-----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-moodle-14.1-jessie-amd64-openstack.tar.gz.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-moodle-14.1-jessie-amd64-openstack.tar.gz 7ce13f982b73ee09e809a56dbb02f213 $ sha1sum turnkey-moodle-14.1-jessie-amd64-openstack.tar.gz 85945002a0ae8d42ce1a33c14bb80e7b617a90fb -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJn2AAoJEIXCXpWhbrlNEYgIAMB08QH3uZLb3v3ykQYeVPSU 2thiZKgCg/gIraHlVkY1Sx9u17ILINOTfQ8PpffyvuknScXQ4b+5cuQglGv0bGoQ eOUpw+WKcQVdKTNE/LvfE2Xu442gwEL7uj6xv6T+R5M5y/BiEhCTO48kGR9BbdfV EMjB+YqU+Ro/io7sy+7AU3L/rvH5fw4rNmT8jWNVUNOKfZgn1+Z/1i7qQrlTtCNF Rm+j8KUtBd5eypd32ZOBizeKwKLPj56kJnmLzlh/EoODSwTE28bjAtvKeeJ45Pw5 rLWem7m9F2WuKUH+VGTd61T5PkoD0CXGeqOWBkhXb0orHWP6Jm9pnOzkOTcPGVY= =Stgs -----END PGP SIGNATURE-----