2. Security services: peer entity authentication services

Data integrity service, data source point authentication service, non denial service 3. Security technology encryption technology, data signature technology, access control technology, data integrity technology, authentication technology 24.2 information security system architecture 1. MIS + s: primary information security assurance system features: ⊙ application is basically unchanged ⊙ software and hardware are common ⊙ security equipment does not have a password