Trust by Certificate. Sets the HP System Management Homepage (HP SMH) to accept configuration changes only from HP Systems Insight Manager (HP SIM) servers with trusted certificates. This mode requires the submitted server to provide authentication by means of certificates. This mode is the strongest method of security since it requires certificate data and verifies the digital signature before allowing access. If you do not want to enable any remote configuration changes, leave [Trust by Certificate] selected, and leave the list of trusted systems empty by avoiding importing any certificates.