Memory Device Security Event Counters for Unauthorized Access Detection
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Solution Overview
Problem
Memory devices storing sensitive information face increasing threats from sophisticated security attacks, such as unauthorized access and modification, which existing security technologies struggle to effectively prevent and detect.
Innovation Solution
Implementing a memory device with internal security event counters that monitor and store counts of security events, such as access attempts, and authenticate operations before allowing data modification, enabling detection of potential security attacks by comparing event counts to expected values and triggering defensive measures when thresholds are exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If security authentication operations are implemented in memory devices, then security protection capability is improved, but device complexity increases
Solution Approach 1:
The patent embeds security event counters and authentication logic directly within the memory device structure, nesting security functionality inside the existing memory architecture. This allows security operations to be performed internally without requiring separate external security hardware, thus improving security capability while minimizing the increase in overall device complexity.
Solution Approach 2:
The memory device is designed to perform multiple functions: standard memory operations (read/write) and security authentication operations. By making the memory device universal and capable of handling both types of operations, the patent avoids adding separate dedicated security devices, thereby improving security protection while limiting complexity growth through functional integration.
2Difficulty of detecting and measuring
If security event counters are implemented to monitor access attempts, then detection capability is improved, but device complexity increases
Solution Approach 1:
Security event counters are integrated within the memory device's internal structure, nested alongside existing control logic and memory arrays. This internal placement enables monitoring and detection of security events without requiring external monitoring hardware, thus improving detection capability while minimizing the addition of external components that would increase overall device complexity.
3Reliability
If defensive measures like power-down are triggered by security events, then security protection is improved, but loss of time occurs due to operation interruption
Solution Approach 1:
The patent implements a threshold-based triggering mechanism where defensive measures are activated only after a predetermined number of security events are detected. This preliminary threshold action allows the system to tolerate a certain level of normal access variability before initiating power-down, thus maintaining security protection while reducing unnecessary operation interruptions and time loss from premature defensive responses.
Data Source
AI summary
Subject matter disclosed herein relates to memory devices and security of same.