The simplest certificate consists of a public key, a name, and a digital signature from a certificate authority.

Digital certificates contain the owner's public key and related identity information.

In general, the key of a digital certificate has an expiration date.

Digital certificates do not solve the problem of digital signature technology where the public key cannot be determined to be the designated owner.

Accept PC message mode

Query the AD server security log mode

Query the syslog server mode

Firewall monitors AD authentication packets

The DMZ security zone solves the problem of server placement well, and this security area can place devices that need to provide network services to the outside world.

The Local zone is the highest security zone with a priority of 99.

Data flows between security domains are directional, including Inbound and Outbound.

Normally, the two communicating parties must exchange messages, that is, there are messages transmitted in both directions between security domains.

Documentary evidence is required in computer crime.

In all investigation and evidence collection, it is best to have law enforcement agencies involved.

Evidence is not necessarily required in the course of the investigation.

Evidence obtained by wiretapping is also valid.