Policy-Based API Call Interception for Application Behavior Control

The patent introduces a policy engine as an intermediary layer between applications and the operating system. This policy engine intercepts system calls from applications and applies predefined policies to modify behavior without requiring changes to the applications themselves. The policy engine acts as a mediator that enables universal customization across all applications through a centralized control mechanism, resolving the contradiction by providing adaptability through policies rather than through modifying each application individually.

The patent creates a universal policy-based framework that can be applied to all applications and operating systems through common interfaces. Instead of implementing separate modification mechanisms for each application, the system uses a single policy engine that handles multiple applications uniformly. This universal approach simplifies operation and maintenance because administrators deal with centralized policies rather than numerous application-specific configurations, while still achieving tailored user experiences across diverse applications.

The patent implements a mechanism where policies are predefined and prepared in advance before runtime execution. The policy engine is pre-configured with rules that determine how different system calls should be modified based on application context, user profiles, and operational conditions. This preliminary preparation allows the system to quickly evaluate and apply appropriate policies during runtime without performing complex analysis or modification logic at call time, thereby reducing processing overhead while maintaining comprehensive control capability.