-----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-suitecrm-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-suitecrm-14.1-jessie-amd64.iso 79bfa0b462bdb69a26ba90c4089c7b79 $ sha1sum turnkey-suitecrm-14.1-jessie-amd64.iso 0411638ac575c424682b5e75c3229fdea2fa5e4f -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP0AAoJEIXCXpWhbrlNWRMH/jRzZ4cFkF5/Dtp1el4mpIc9 lEsipL05g3EFsGprzli4vi/WW7M+uotrEPMYsGIKLEF9hL/LlQufs7aaZqvUb1qP MxB7NvppBPv/Q0lC6P3AOtJ76ZIUTMLRTTxZGiNphqiSstFHULk4wVSeUBEIPndM YREhJ58hWg7gQobLmcoK+MgSolxI8kZ0BiNcXWuPojFlAKholUxf39cCHvduHnMX Vt1hbrlGnVNZmJIm4jiE9AOiIc9Zejwr6H6xHxAwAbNqXR+k3RYl2Pu3l+4+6iL4 9U1o/u0krrZYGsMhecCCsf++aKuMGHCzAO6YkUU1MMZGmcmeW760vb7UwmIuDBg= =v83e -----END PGP SIGNATURE-----