Cold Boot Attack Mitigation via Temperature Sensor Key Erasure
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Solution Overview
Problem
User equipment (UE) is vulnerable to cold boot attacks, where an attacker can retrieve encryption keys from RAM by cooling it and rebooting the device, allowing access to sensitive data despite encryption.
Innovation Solution
Implementing a temperature sensor to detect cold boot attacks and executing prioritized security procedures, including erasing encryption keys and data from memory components, disabling communication, and notifying a back-end system to prevent further access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption is used to protect data stored on the UE, then data security is improved, but the UE becomes vulnerable to cold boot attacks where attackers can retrieve encryption keys from RAM
Solution Approach 1:
The system performs preliminary actions by detecting temperature changes that indicate a cold boot attack is in progress, and proactively erases encryption keys from RAM before the attacker can retrieve them. This preemptive key erasure neutralizes the cold boot attack vulnerability while maintaining encryption protection.
Solution Approach 2:
The temperature sensor provides continuous feedback about the thermal state of the UE. When the sensor detects temperature changes consistent with cooling operations (a prerequisite for cold boot attacks), the system triggers security procedures to erase keys from RAM, creating a feedback loop that responds to attack indicators.
2Ease of operation
If the UE is left unattended for a short period of time, then ease of operation is improved, but the UE becomes susceptible to cold boot attacks
Solution Approach 1:
The UE performs self-service security monitoring by continuously tracking its own temperature state and automatically initiating key erasure procedures when cold boot attack conditions are detected, without requiring external monitoring or user intervention during unattended periods.
3Duration of action of stationary object
If the RAM is cooled prior to terminating power, then the RAM can retain its contents for longer, but this enables attackers to perform cold boot attacks
Solution Approach 1:
The system converts the harmful effect of extended RAM retention (which enables attacks) into a beneficial security feature by using temperature monitoring to detect when cooling occurs, and then leveraging this detection to trigger proactive key erasure, turning the extended retention window into an extended protection period.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively thwarts cold boot attacks by securely erasing sensitive information and preventing unauthorized access, thereby protecting user data and communication integrity.
Implementation Method 1
In an embodiment, a temperature sensor may be installed within a UE. When the temperature sensor determines that the temperature of one or more memory components (e.g., the RAM) of the UE falls below a threshold, the UE may detect that a cold boot attack is occurring.
Data Source
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AI summary
A method for hindering a cold boot attack on a user equipment (UE) is provided. The method includes, in response to detection of the cold boot attack, executing prioritized security procedures. A user equipment (UE) is also provided that includes a processor configured to execute prioritized security procedures responsive to detection of a cold boot attack.