-----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-drupal8-14.1-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-drupal8-14.1-jessie-amd64.iso 6c58aff00f00cdb4720a9e008ca765cb $ sha1sum turnkey-drupal8-14.1-jessie-amd64.iso 1a9c3cf265a9f18d3f804617b06076eb8e32f2e3 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlNM5MH/iO4AOW5MuEsCemKGEeyZiws MK6g5WpTEg3y8ULgfTGu8ZUimsqAdxtII5iHRgZSB4MUe8lfmAT4a+ns1Ksv+woV 4/seZFUxk4+3VFAoXLnxsc258IjzTWxnURG7A/GlcU7V+8gG09PdxdWeY6h7H7is J1CEwVncW7OEKOY5aJEbZi+tk81Cgf+ImCVYbcut/d3JPA8/zm4zR4A7ZY6iwEs0 FhJs4cTOmhP4qtNEFlRUzN802DSIgjkz+6g6hSy+EqIoYwtfxrgNcZ8rP1EII/6b 3pNxqZM0hlxvHCMC7rxTKvooaLKYvniScKRHRtZZlARh/73cFyW2rZl4JsjCy/M= =2hX0 -----END PGP SIGNATURE-----