-----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-phplist_14.1-1_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-phplist_14.1-1_amd64.tar.gz 40d56184eee81362398b48f6521d6c53 $ sha1sum debian-8-turnkey-phplist_14.1-1_amd64.tar.gz f8f137a7d70b320289cb9b4877a03d3e6266a154 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJntAAoJEIXCXpWhbrlN8wcH/2iJIl6eZpjlNO+ZEXZZfwud +FbhVRbFF3Y01qARV4wa8/M2jnNjhmcwPStbvvO7pRJKp/oT+OaEyniC6jobA0hg z4VILlxKrfT18zVqGoEsP1xMUDgVSnFGYkWQTc9kQCunh8lkmu8MFvom3wUg87VL FU4WPMtXBpHv61bfNrpRmT0XNvgOGrtw+IKbevjyJHZAvETJBvya5VgDqTIVooXP DpyMUJv1WNjiX7a7nN88iUhn78oy1fdniT1cz6j+DJgFudPpoW6lhLSb+YsUiUIz 3KfyJQO7MgNCHSPCNJychKJHSv4LYS9PjpfRvWEMkOabn9Zhofb7TXm7GA8d56s= =0z5c -----END PGP SIGNATURE-----