-----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-drupal7-14.1-jessie-i386.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-drupal7-14.1-jessie-i386.iso c06ab3ad2c326b14d9fc41d76fd31d42 $ sha1sum turnkey-drupal7-14.1-jessie-i386.iso 037e68f200df80ff3de02444fada9952cea19d16 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlNmk0IAKWILC8ckfixRYpDS5OeCn3p Srx8BqR8XYVD1iXqEbkTYoeDQGk4HtMsCxqC6p6dmpTuzy8TE4KDwJ3b6FglD9xz qcaD4ZKsd6SL8eYV3URwJ4qijVT2aGWeEGcLMPM8A6rZ7KV3g4LocdQwOmVsobiT Ypa1EqSSobcePq5xvMklR9YX1084P4lshy+QYdtcYprv5cKW0IXoKiir+tZaX6rm 4+0zXMfgkx3n9KSVtP1ArorcD+iQgrxzJ519GMGplZIakq5KJ7X1U8lNINGOT/oc nFNCZQTRKd0f8eFOxOdG9FML52AHgkauMVdffVR7S3yrz7HRnTyRRKpNmvAVqz8= =QUXl -----END PGP SIGNATURE-----