OTP Switch Information Tamper-Resistant System
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Solution Overview
Problem
Existing information tamper-resistant methods in the chip manufacturing process are complex, require high hardware resources, and have limited application scenarios, making them ineffective in preventing information theft and tampering from wafer taping to end-user usage.
Innovation Solution
An information tamper-resistant system utilizing One Time Programmable (OTP) switches for secure writing and reading of information, with a hash encryption algorithm to ensure data integrity, where OTP switches are permanently switched off after verification, preventing further modifications and ensuring secure transmission from chip manufacturing to end-users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional signature and encryption methods are used to prevent information tampering, then information security is improved, but system complexity and hardware requirements increase
Solution Approach 1:
The patent segments the information protection function into multiple independent OTP switches (first OTP switch for writing control, second OTP switch for first reading control, third OTP switch for second reading control). Each switch independently controls a specific operation, dividing the complex encryption/verification system into simple, discrete physical control elements that are easier to implement and verify.
Solution Approach 2:
The patent uses OTP (One Time Programmable) switches that can only be switched once and cannot be reset. These disposable switches provide strong security guarantees while being simple in structure and low in cost compared to conventional encryption hardware, eliminating the need for complex key management and cryptographic processing.
2Reliability
If conventional encryption methods are used to prevent information tampering, then information security is improved, but system resources are heavily occupied
Solution Approach 1:
The patent extracts the security control function from complex software-based encryption systems and implements it through dedicated hardware OTP switches. This extraction eliminates the need for occupying CPU cycles, memory, and other system resources with cryptographic operations, while maintaining strong security through physical one-time control mechanisms.
3Reliability
If conventional encryption methods are used to prevent information tampering, then information security is improved, but application scenarios are limited
Solution Approach 1:
The patent creates a universal information protection architecture using OTP switches that can be applied to various information types and scenarios. The same basic structure (storage module with OTP switch control) can protect different kinds of information in different applications, from simple data protection to complex multi-stage information release scenarios, greatly enhancing versatility.
Data Source
AI summary
The present disclosure provides an information tamper-resistant system and method. The system includes: a storage module; a writing module connected with the storage module through a first OTP switch, to write source information to the storage module; a first reading module connected with the storage module through a second OTP switch, to read out written information in the storage module and disconnect the first OTP switch and the second OTP switch after confirming that the written information is accurate; and a second reading module connected with the storage module through a third OTP switch, to read out information stored in the storage module after the third OTP switch is switched on; the first OTP switch, the second OTP switch, and the third OTP switch can only perform one switch-on operation or one switch-off operation. The system and method effectively avoid theft and tampering of information.