-----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-nginx-php-fastcgi-14.1-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-nginx-php-fastcgi-14.1-jessie-amd64.iso 3d74ce80b6c3148d3982c2b6e7f12bd4 $ sha1sum turnkey-nginx-php-fastcgi-14.1-jessie-amd64.iso bb7287f3eda4de5da1bc0845e1da7696923e0ce3 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPzAAoJEIXCXpWhbrlN0lIIAIlpBawOLQEMybxthZXXtTMG 3OOWiP+AhQiwK/F4CDSX62ASFAqYSawYCp95xLdtdkBnnC5CeqWKDJMw9yMEDSF9 UXFI9jaTXbChHJkCIcZKuwLyNlqUygPDtkdIi4a8JmPj8m/klM/D5L8sJiKGcAvA bqCv/JiUWWyibmm7iZWgIs7ZnZiY2kOILWSOyiX8aGAK2mjbRtDLUxrLTRomNrpP 8LphYY1icbAvgUTuZn2nT16Se5p86RAORq4v2zcBE5GmpQ9OGkkORr7kRVRadeCy KPUEYWApnWJI7Xj5Q1n1Nr3wpvnQZ+k2IaxmL6tcyFOW8VL/pqjVXF1u8dzmM8k= =YuuF -----END PGP SIGNATURE-----