-----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-piwik-14.0-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-piwik-14.0-jessie-amd64-openstack.tar.gz ef0027c214642389b81e084ac0a08302 $ sha1sum turnkey-piwik-14.0-jessie-amd64-openstack.tar.gz 63652f4e601d8b710e2a427fd0e2360b70089eb9 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWXYG+AAoJEIXCXpWhbrlNTsYH/1CTC7OuqRWoCvowt0TaffFW wtCDy4cKBrpMm6jLiy1614biHFuOp6ClhYJkp7hhP7dBslYnC+gF0DYlQ1N9QScV dATtod5gfg9bNmR1442PwVrTD+9QYhaTgVkq83vNshRiR3b2VAXY8IZZBOULqaGm Alxyfi05/Eu0/G5TXRzx5yYaTd1iMe3kkN/Zdl53s9eVTo7Z5Q8Yn61+UdnSH8tH ZXGZH/4k/Vb/4cUmomSe5XEJxWEM77PH5VPEZ8nuh38LbbKKIi5LlLVMU64cNBWA Zcb4w6C1eOP0z45Tv0iksrr8Tus4nIkKJFgYL449repDRmdKBV+na0Hf/XAyn5s= =8cQ5 -----END PGP SIGNATURE-----