-----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 debian-8-turnkey-zurmo_14.0-1_amd64.tar.gz.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 debian-8-turnkey-zurmo_14.0-1_amd64.tar.gz 4509b516f623c349f1633ca57b24bf01 $ sha1sum debian-8-turnkey-zurmo_14.0-1_amd64.tar.gz 83c8f161763809f04098126e4f27a24d4f24bdac -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWObxXAAoJEIXCXpWhbrlNkhUH/1jdBdUl4RmbPWtgIb8uE6CW Iv0OXDaALcqgF4rz19wqMWAeyV0ypHROB7ZPG899XolFQhNQwcVA4ZlZu3frFYpo 7xcBnoxetGWD67gW7B4erjNKFlfW73PIHqHShUYVoMpovGrvc3ICLmzPcrK+6FH0 IUc3QOPNQLdVC2Qlj01WiacYIrWWqWZf+JjFVPofTBD1Pj2UvHSxLDClRn58Yv8K 3IdaV5HRBGRFeJIsKXiJoDXZ05YrdyMXZkaQHLCAJVBq4gVMkGXOm/sSO7HxaeRU 82lhVTAJLq/w4qWjrNt5pwpwxK9lbGiulbuBfWYFT+GeIpaVJR9gsP4sPtfW4K4= =iVsE -----END PGP SIGNATURE-----