-----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-lighttpd-php-fastcgi-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-lighttpd-php-fastcgi-14.0-jessie-amd64-openstack.tar.gz 4687f6f9e186a27536a3c734ba412653 $ sha1sum turnkey-lighttpd-php-fastcgi-14.0-jessie-amd64-openstack.tar.gz f1ce34b8ae9a32533ba6f8f46715da63fb55c9ad -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWXYG9AAoJEIXCXpWhbrlN9aMIAL1Fk/LHMw9DExxZf+XXEwKy slgALiTImwsw7YZSLYkwBM9VkIfU19knRn7RrtS/1iFB3ZC/mEXGqg7E45p6Rf6O 0bGXAic/KRnbmq7843KX0TsZDC/z7YrZyTztWbxVuz/ex4n0FfEsYDxp5F5KVYMG aqwxWQkD8Mn9lzWJU49cYSMaimKHEqIYh7VEgUxE/ekk5gqPyiS6MZYYoBzNbBKL 0BNDM6sXA1nY3M2O3DVnwWgQGd7OpggQBrHfoKu/FE01US/6NXHj0vgCQtCvxtnD mHM2iz+jfUU10pEfCHN1HYA0fJ8YUqqmaR5aAg1HlWLWAZewBVGkHkCIfqUrX+w= =gZi/ -----END PGP SIGNATURE-----