-----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-joomla3_14.0-1_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-joomla3_14.0-1_amd64.tar.gz 5ac0dbdb7461eb3909b6743619a8b41f $ sha1sum debian-8-turnkey-joomla3_14.0-1_amd64.tar.gz 8fada5a8d5b3cea6a964a6a47e9797e54f2c70a4 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWObxTAAoJEIXCXpWhbrlNUJAH/jPRu+0z/qP1t0G22Hcpch3y d05BpAKQWkL3U9UGmOTiOtqX6/npbYSlqDS2sSGu1NvmzKe8Q9lbKK4jXS79m03o earTJpvkE3bIyqsn4TmDXlH6QKa4RNY42BcshK5Eu8KN1M9hCHvUfz9GjeapDVWF oJIQ/IjbKD5QtmumuTOhbLAYp16Jq6qixbpo1NRSyJeda1HkkcyaBsN++707mKnG oRtJFq9ZbPTpK169pBtfoz4OYm763/ZFn9FRhTQFOZn60F1VsMtWVuOOcovvTt3r clgcZmRqg1g58SObwimIY0/4h3GnIHvlltd2FEll/0MXhPiy6Ddna3xrP9JyW0k= =3/8K -----END PGP SIGNATURE-----