-----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-mediawiki-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-mediawiki-14.1-jessie-amd64.iso e9ed21680e3fbe371a0e4fb29ba9fdfb $ sha1sum turnkey-mediawiki-14.1-jessie-amd64.iso bf88cbc513db5246707f4193211319a18d5362ca -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPyAAoJEIXCXpWhbrlNlCAIAJ8e194nt303ratpU+sK2kkv fXlTN5pcrOhzpKW/DM+W0Xq4QPGUW2lNHS0YLpj9Mzh2uRKEcEjk+00glzuuTU4a WXdVK4IokwekEL8Mg9M+fvb3RHKXvzPuD1dlCB46gk13Y2iAi/l4vxO1J8BABbIg vWkj/xdACwN7BPPCD8pWPkfvhjAsMUrjleuqYlnl0hXs3buP/pgG5ahumWatS+f3 2n+wZw+m62OeUG547CnH9H3cJvfgjyJM589kjvg5hSdG0a9b8HmSezhisQdwhdYA agCDmPOQuhEUyx80StehC/1JMF0a5ruPM42VmSUjEOq8/csYxlb1zV1zTgzsTCY= =I1xH -----END PGP SIGNATURE-----