Microprocessor Nesting for Tamper-Resistant Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional authentication tokens lack effective security measures against tampering, as they can be physically accessed and compromised, allowing hackers to duplicate or bypass authentication processes.
Innovation Solution
Positioning a microprocessor between a printed circuit board and a circuit element, such as an electronic display, to restrict physical access and electronically prevent operations if tampering is detected, either by stopping all operations or switching to covert signals that alert an authentication server of the tampering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the microprocessor is positioned between the printed circuit board and circuit element to restrict physical access, then security is improved, but device complexity increases
Solution Approach 1:
The microprocessor is nested between the printed circuit board and the circuit element, creating a layered structure where the microprocessor is physically protected by being sandwiched between two components. This nesting approach provides security without requiring additional external protective housings or complex locking mechanisms.
Solution Approach 2:
The circuit element serves dual functions: it performs its original electronic function while simultaneously acting as a tamper-detection mechanism. By merging these functions, the patent avoids adding separate complexity for security monitoring while still achieving enhanced protection.
2Reliability
If the microprocessor is electronically prevented from performing operations in response to tampering, then security is improved, but loss of information may occur
Solution Approach 1:
The patent converts the harmful effect of tampering (physical access to the microprocessor) into a beneficial security outcome by using the tamper attempt itself as the trigger for protective action. The act of opening the housing or removing the circuit element directly causes the microprocessor to enter protective mode, turning the security breach attempt into the activation mechanism for security protection.
Solution Approach 2:
The microprocessor is pre-programmed with anti-tampering logic that automatically activates upon detecting tampering conditions. This preliminary anti-action is built into the system beforehand, so when tampering occurs, the protective response is immediate and predetermined, eliminating the need for external intervention or complex real-time decision-making.
3Reliability
If spring loading the battery is used to disconnect power upon opening housing, then security is improved, but ease of operation deteriorates
Solution Approach 1:
The patent extracts the tamper-detection function from the mechanical housing structure and relocates it to the circuit element and microprocessor system. Instead of using mechanical springs in the housing, the security monitoring is performed electronically through the circuit element's connection status, eliminating the need for complex mechanical spring-loading mechanisms in the housing assembly.
Data Source
AI summary
A technique provides security to an electronic device. The technique involves disposing a microprocessor between a printed circuit board and a circuit element to restrict physical access to the microprocessor, the microprocessor having (i) a bottom which faces the printed circuit board in a first direction and (ii) a top which faces the circuit element in a second direction which is opposite the first direction. The technique further involves delivering power to the microprocessor from a power source while the microprocessor is disposed between the printed circuit board and the circuit element, the microprocessor performing electronic operations in response to the power delivered from the power source. The technique further involves electronically altering or preventing the microprocessor from further performing the electronic operations in response to tampering activity on the circuit element. Such detection of the tampering activity may involve monitoring a covert signal for tamper evidence detection.