This space has five element

s: authentication, permission, integrity, encryption and undeniability.

1. Security mechanism 1) the first layer: infrastructure entity security, machine room security, site security, facility security, power system security, disaster prevention and recovery 2) the second layer: platform security operating system, network facilities, applications, security products 3) the third layer: data security media and carrier security, data access control, data integrity, data availabilityData monitoring and audit, data storage and backup