-----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-espocrm-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-espocrm-14.1-jessie-amd64.iso 1c005872d2931d0a9de8dea19b9aaea2 $ sha1sum turnkey-espocrm-14.1-jessie-amd64.iso 85dde84877da4a02deeaf5cdef85cc27b64a66d6 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlNJQMIAOZsPQqNSpJsExlk0ZQslhTQ rXa0PuxyioxsCYIOSJpQS5MNiuIkR89ZRg+0Mp0jrtsiiCeBkN+oJORL3Vy/Kv5U dWSg8fKegNinhzkx+O78zzsDyeySKThg35pUMMw2lJtgmbiRON34/ImwyMjqNNgb 8MdIUTorxf0m1AkED6n9CwF1lxrT8kZURUJgHU3JXrc5J/EsWqlNVaRlYqEweZTY zYh6K7+4PzZYqdDWHEsdnUvLANArw1eHJI3WvF4evqU+32qm1PEHFecTOcAMARiQ QkbwmhX/rcA5yRchdd1iNsFEvb16n+9bFVswfGKXysphJQD+x9BVh9UbCNWN5MQ= =LZr+ -----END PGP SIGNATURE-----