-----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-14.0-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-14.0-jessie-amd64.iso 375d0fbce8dceef593b9bb9cc85828b9 $ sha1sum turnkey-nginx-php-fastcgi-14.0-jessie-amd64.iso a8394817697f8813911ecc9a99477397ea6e8654 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWL0DfAAoJEIXCXpWhbrlN7MsH/2PRXNkJY6FclOSC7ZSEt6jB PF+XZOvinGYlLlfdHc3qveEmLHK+xM5T35ZnSerc1zJhGoH8Jfg+vYwDpzYv0/UO 1/qkKc7FUFoZpTgIpUya1U+fGLYF9zQb3VwAurqMCt9a7VaZ1K9pXUeVsIlBXhdC lYSTTxBEu4vprujvGBhS5P86F+VgHgPhrebBCqIioALI9WQS80l0CUoLt50gjW4G sN7ikpZITt3wprH7QZ9cISs6p0jvF5+lG9kETVyUQaoNmLJPcuDJ/4y95izTPMc6 pjX648/fQgTIGcbGOrdeEaUQvRReIKgug+1T7cOIE9g7mXc4PTUri7ustEQ08LM= =iN07 -----END PGP SIGNATURE-----