Multimodal Memory IC for Tamper-Protected OTP Key Storage
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Solution Overview
Problem
Existing OTP encryption methods face challenges in secure and efficient distribution of encryption keys, particularly for highly secured data, due to concerns about key security and trust in key distribution processes, especially with the advent of AI-enabled systems.
Innovation Solution
A multimodal integrated circuit (IC) chip with tamper-resistant and tamper-sensitive features, including a non-transitory memory and a truly random number generator, ensures secure storage and deletion of cryptographic keys, preventing unauthorized access and ensuring trust in key security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If OTP encryption keys are prepositioned and distributed to recipients, then encryption security is improved, but key distribution security and trust challenges worsen
Solution Approach 1:
The patent extracts the cryptographic key from the distribution channel and stores it directly in secure memory within the encryption device. The key never leaves the secure environment, eliminating distribution vulnerabilities while maintaining encryption security.
Solution Approach 2:
The patent introduces secure memory as an intermediary between key generation and key usage. This intermediary component stores the key in a protected state, preventing unauthorized access during what would traditionally be a distribution process.
2Ease of operation
If encryption keys are stored in memory for secure access, then encryption functionality is improved, but unauthorized key access risks worsen
Solution Approach 1:
The patent applies different security properties to different parts of the system. The memory storing cryptographic keys has enhanced security characteristics (tamper-resistant, restricted access) compared to other memory in the system, providing localized protection where it is most critical.
Solution Approach 2:
The patent implements preliminary protective measures by designing memory with inherent tamper-resistant properties and restricted access controls before any potential unauthorized access attempt occurs. This prevents rather than reacts to security threats.
3Reliability
If tamper-resistant features are added to protect cryptographic keys, then key security is improved, but device complexity worsens
Solution Approach 1:
The patent combines multiple security functions (key storage, tamper detection, access control) into a single integrated memory component. This merging reduces overall system complexity compared to having separate components for each security function.
Solution Approach 2:
The tamper-resistant memory serves multiple functions: storing cryptographic keys, detecting tamper attempts, controlling access to keys, and maintaining security policies. This multi-functionality reduces the need for separate dedicated components.
Data Source
AI summary
A multimodal integrated circuit for use in unbreakable cryptography has a chip substrate and a memory positioned on the chip substrate. Unauthorized access of key bits stored on the memory is prevented. An encryption device for use in cryptography has a truly random number generator (TRNG) stored on a non-transitory memory. At least a first and second encryption modules have a memory for key storage. The first key bits generated with the first TRNG are stored on the memories of the first and second encryption modules. Source data is decrypted or encrypted with the first key bits stored on the first and second encryption modules.