Encrypted Cache Protection With Nested Keys and Decryption Monitoring
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Solution Overview
Problem
Existing computing devices lack effective methods to protect encrypted password and cookie caches from malicious access, necessitating improved techniques to detect and prevent unauthorized decryption attempts.
Innovation Solution
Implementing multiple layers of encryption for key material controlling cryptographic access and instrumenting compute instances to detect unauthorized decryption processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple layers of encryption are implemented for key material, then security against malicious access is improved, but device complexity increases
Solution Approach 1:
The patent implements nested encryption where key material is protected by multiple layers of encryption. Each layer uses different cryptographic algorithms and key management mechanisms, creating a nested structure where breaking one layer does not compromise the underlying layers. This resolves the contradiction by providing enhanced security through multiple protective layers while organizing the complexity in a structured, manageable nested architecture.
Solution Approach 2:
The patent segments the encryption system into distinct modular components including key generation modules, encryption modules, decryption modules, and verification modules. Each segment handles specific cryptographic operations independently, allowing the complex multi-layer encryption system to be managed through modular design principles, thus reducing overall system complexity while maintaining high security.
2Difficulty of detecting and measuring
If compute instances are instrumented to detect unauthorized decryption processes, then detection capability is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the instrumented compute instances continuously monitor decryption operations and provide real-time feedback about detected processes. The system compares detected decryption attempts against authorized process lists and provides immediate feedback when unauthorized access is suspected, enabling dynamic adjustment of security measures while maintaining manageable instrumentation complexity through automated monitoring and response.
Solution Approach 2:
The detection system is designed to be self-service, automatically monitoring its own compute instances for unauthorized decryption processes without requiring external intervention. The instrumentation includes self-monitoring agents that track process behavior, automatically compare against authorization lists, and trigger security responses autonomously, reducing the operational complexity of managing the detection infrastructure.
Data Source
AI summary
Secrets such as secure session cookies for a web browser can be protected on a compute instance with multiple layers of encryption, such as by encrypting key material that in turn controls cryptographic access to the secret. A compute instance can be instrumented to detect when a process attempts to decrypt this key material so that the process requesting decryption can be compared to authorized or legitimate users of the secret.