-----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-xen.tar.bz2.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-xen.tar.bz2 e7bb778d80399e0508d01e667b3f2cd8 $ sha1sum turnkey-piwik-14.0-jessie-amd64-xen.tar.bz2 b7fb4f646335fd7577894a69f247614e7056a6cc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMdiCAAoJEIXCXpWhbrlN3mcIAKCIEZ6Lk7vB8C4eXiJQUGnt XnYjj+z+QjVhh9DLI8uvagRmUQgD8Ad3sE4YEoSqUcfwTdT7vTevxVL4vQ5xojOR //SmvkIfPgWGyLPp0ASXoOTZcjzqqAnni6wZ+s9Uw+2auLaSni0hCSQ0oJeyjMwv jv5Dc7lbVQFM7ZBODfByzZPF74//xSGUNR7fO181CpvUbyY6KZHy56ZwccjkFiYi HboJ0S8yCNno2t80qjKMpubeA6mByZo7gX+FkNdFuTNyuVW+kohTU/oLPngGU26F KlUUlzlRXxQDOVsFOIYs9XaNQ8u6k8dDH79e6RAtfNIuiHFOK3A3L0lfAJaw1R4= =9gfl -----END PGP SIGNATURE-----