-----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-core-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-core-14.0-jessie-amd64.iso c44241c501eb378fa321ab93e1271361 $ sha1sum turnkey-core-14.0-jessie-amd64.iso e3cd4d6ae936188c53ab223fbd2fcc8fc0613170 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BroAAoJEIXCXpWhbrlNCYwIANuVJT7T9tb86dXw3DN9iX8u PXvF37dYvSY3w1HFUGHHNLHN0liu7IaQbtePZ0WpgZ2lDg156jZ/ukkreTwDlmkb 1ANbVo0eF62ElzO08kX1euQ1KgczMhrALmbGS5K7qsF5y+24ziX6jWcAyl1EMSE7 5SpZothB47mENwFvbbHn/TKEyOlkmucbB7A+6xnXuSsKy64TsJj7qS7Ii6AmFhQt B3RsMOLpfraMECRkI5LwJH1EmjvEhPLl1uEs4dlKrfkEpb7cokwycV0J9wii/TX9 ktF+8OD5+gY85yXXzJCo6RJu/9qiRdVzl3hGcICTa1Yt1ayJvjwn24I9A2KFJp8= =inXi -----END PGP SIGNATURE-----