-----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-phplist-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-phplist-14.1-jessie-amd64.iso da22eeea1f1da164dcec3816731691ec $ sha1sum turnkey-phplist-14.1-jessie-amd64.iso 5e192d6702d79d5cbc7f0cc4afd29118e7c56241 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPzAAoJEIXCXpWhbrlNuJYIAKcwY/SWFVFN5RdUAH01ZlHS QC6xmZarqgoxwU/cmHq+j3uc6OrdlOpJuBrvB9dFBgCxsIEzM7RLY/0+V1KICUNR CcBFD0OnP06N3COQShs4H9MxEaoStGuyhZCu+cJfukVi9CTTJQcpDUBRJeOWaB7G rUp/rBpqqFzwj+ZWRCZ0UJsOk6VO5yN0Hpv4bT227Xb/BjcspPfppjoXR8uC0mHE WAo2M2FfWLm/f7fJGiYB3rSumv1ov+kR2fLtTjBsQCfXhpji8yUrBpEizAG37x4e tZcR4VoDwW8YubYxkp8oS2+5VruYvGIPLreISBTVL3av8du+ZtNgt0b1GD5Fwsg= =8TIJ -----END PGP SIGNATURE-----