-----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-otrs-14.0-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-otrs-14.0-jessie-amd64.iso 3c4f360a4d001a65ebe1121c8c7af103 $ sha1sum turnkey-otrs-14.0-jessie-amd64.iso b7bdca343469257b92439eb5d7d23cc296945f44 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWL0DfAAoJEIXCXpWhbrlNVqAIAIIJcHy7SqBDH/4WAdtLcukX 5iP/6kzRqncujxIl5SMKzYj0YrnrwnGBwXPE3a57YB3+tif432AFW17ldeeWNGpM suDv/E6tw9rhuQgKKnj+olL8d2DxFRN2PkMGBgaaLE4trwem2Z2K+rjUj3ARZoVg 00WuquEMAGvSXZioxqwqB6yverQ989kuLT/5fnPAyq3Cgx/2C08RiJgaesGsf86d 2WomlDQdEUJ5SajyXy2meCT+cFfE3wV927EALZhZdlvzShPTE1gAEToDwVRFEvOQ faOZ0lxr4Z6QnRfxx3bqqGumgFrkHIkSz0TSdboe72/CLwfC1FCtdle41oROE/k= =bkXV -----END PGP SIGNATURE-----