Tainted Value Cache for Java Command Injection Protection

The patent introduces a proxy class mechanism that acts as an intermediary between untrusted input sources and sensitive Java API methods. The proxy class intercepts method invocations, validates inputs against tainted data, and only allows safe operations to proceed. This mediator approach provides security protection without directly modifying or injecting code into the core JVM or Java API classes, thereby maintaining their stability while still achieving command-injection prevention.

The patent performs security validation actions in advance by creating a proxy class that pre-establishes validation rules and interception logic before the application runs. The proxy class is configured with knowledge of which methods are sensitive and what constitutes tainted data, allowing security checks to be performed automatically without requiring runtime modification or complex instrumentation setup. This preliminary configuration simplifies deployment while maintaining strong security protection.

Instead of modifying the core Java API classes to add security functionality, the patent inverts the approach by creating a separate proxy class that wraps and intercepts calls to these API methods. The proxy class contains the security logic and validation rules, while the original Java API classes remain completely unmodified. This inversion allows the solution to work with any standard Java implementation without requiring changes to the underlying JVM or API libraries, thereby maintaining full adaptability and compatibility.