Cryptographic Memory Intrusion Detection and Data Removal
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Solution Overview
Problem
Current methods for securing cryptographic systems against cold boot and side channel attacks are inadequate, as they primarily focus on perimeter security and hardware modifications, failing to effectively protect cryptographic data in memory from physical breaches.
Innovation Solution
A software application that detects intrusion signals and responds by removing cryptographic data from memory, either by flushing or overwriting it, and optionally dismounting storage devices to ensure data integrity and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cryptographic data is stored in memory for system operation, then system functionality is maintained, but vulnerability to cold boot attacks increases
Solution Approach 1:
The patent implements preliminary actions by detecting intrusion signals before attackers can access cryptographic data in memory, and by proactively removing the data or rendering it unrecoverable before the attack completes. The system monitors for physical access attempts and preemptively secures the data by clearing memory contents or making them不可恢复
Solution Approach 2:
The patent applies preliminary anti-action by implementing countermeasures that oppose the cold boot attack mechanism. When intrusion is detected, the system actively counteracts the attack by removing cryptographic data from memory or rendering it unrecoverable, thereby neutralizing the threat before the attacker can cool the memory and extract keys
2Reliability
If cryptographic data is removed from memory upon intrusion detection, then security is improved, but system functionality is disrupted
Solution Approach 1:
The patent implements dynamics by making the memory contents dynamic rather than static. Cryptographic data in memory is transformed from a persistent state to a transient state that can be rapidly cleared or rendered unrecoverable in response to intrusion detection signals, allowing the system to adapt its security posture in real-time
Solution Approach 2:
The patent applies segmentation by separating the cryptographic data storage from permanent storage and keeping it in volatile memory that can be independently cleared. The system divides memory management into segments that can be selectively cleared based on intrusion detection, allowing partial or complete memory flushing without affecting the entire system
3Reliability
If physical access controls are implemented, then perimeter security is improved, but protection against determined attackers is insufficient
Solution Approach 1:
The patent introduces an intermediary layer of software-based intrusion detection and response that sits between the physical hardware and the cryptographic data. This intermediary monitors for physical access attempts and intermediates the protection by detecting intrusion signals and triggering automated responses to remove or secure cryptographic data, adding a layer of defense that operates independently of physical security measures
Data Source
AI summary
An electrical signal indicative of an intrusion is detected at an application executing in a cryptographic data processing system. In response to the detection, an instruction is constructed in the application for the cryptographic data processing system. Using a processor, the instruction causes a cryptographic data item to be removed from a portion of a memory device installed in the cryptographic system.