-----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-twiki-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-twiki-14.1-jessie-amd64.iso 139962312ee109d47f4c27eaa18eb58c $ sha1sum turnkey-twiki-14.1-jessie-amd64.iso 4467cfd71a4c12f173e17a497b1dcb2fe3869f1b -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP1AAoJEIXCXpWhbrlNd6wH/A1VZj3uXaPeG+udZcZWfI10 TGRr3sEGE76CldOOiKyvlt2u5unEo+baTAVriL/HnGr6q54kdKgleMNJyq0dWr94 w5dUHHBuii5Wwsj6hZ7dCFLLaiv/voOmV+TR/DtLMuqi1dX/jykxNdjMSSmok860 ETOCWwxegaQhbxYvDlwy2p3G3cXACdDDwVHmIWr6fHMecA+agdxwqEQKDKblqtv5 Hk5NEV2qC4z1nksJy0R7X16ZpgLMpU7m0pNh/XOIp/iYxIZqBGuAECPUp7YmiRdL 7XPhXPULwQqk1vUBreNhT15sOcHFRPdxTLK8eKfZWDEvp+lyrIX3LqZgmPxZywc= =1tF8 -----END PGP SIGNATURE-----