QKD Network Node Key Transmission Using PQC Encryption
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Solution Overview
Problem
Current QKD network nodes rely on expensive and potentially insecure SSL-based protocols for data exchange, which may not be sufficient against future quantum computer threats, and there is a need for an alternative method to securely transmit quantum keys within these nodes.
Innovation Solution
Implementing a method that uses Post-Quantum Cryptography (PQC) encryption methods to encrypt quantum keys across multiple structural levels within a QKD-capable network node, ensuring secure transmission and reducing the need for extensive security equipment, with authentication processes and a client-server protocol for key management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SSL-based protocols are used for data exchange within QKD network nodes, then security is provided through established cryptographic methods, but the security may no longer be sufficient against future quantum computer threats and extensive security equipment is required
Solution Approach 1:
The patent replaces SSL-based cryptographic protocols with quantum key distribution mechanisms for securing data exchange within QKD network nodes. This substitution transitions from classical cryptographic security to quantum-based security, eliminating the need for extensive SSL security equipment while providing future-proof protection against quantum computer threats. The QKD system generates and distributes quantum keys that secure communication between components without requiring traditional SSL infrastructure.
2Reliability
If SSL-based protocols with RSA, Diffie-Hellman, or elliptic curve cryptography are used for encrypting data traffic, then data exchange is secured, but the protection is complex and expensive
Solution Approach 1:
The patent substitutes SSL-based encryption protocols with quantum key distribution for securing data exchange. Instead of using RSA, Diffie-Hellman, or elliptic curve cryptography, the system employs quantum-mechanical key generation and distribution to secure communication between QKD network node components. This eliminates the complexity of multiple cryptographic protocols while providing inherent security based on quantum physics principles.
Solution Approach 2:
The patent changes the fundamental parameter of security from classical cryptographic complexity to quantum key properties. By transitioning from mathematical security assumptions to quantum physical principles, the system achieves security without the complex protocol stacks required by SSL-based approaches. The quantum keys generated through QKD provide information-theoretic security that does not rely on computational complexity.
3Reliability
If trusted nodes with specialized monitoring and access control technology are used, then robust security is ensured, but the technology is very expensive
Solution Approach 1:
The patent replaces expensive trusted node infrastructure with quantum key distribution mechanisms. Instead of relying on specialized monitoring and access control technology, the system uses quantum-secured key exchange to protect data exchange between components. This substitution eliminates the need for costly trusted node hardware while maintaining or enhancing security through quantum physics-based protection.
Data Source
Figure 1
AI summary
The invention relates to a solution for cryptographically secured transmission of quantum keys between structural levels (1, 2, 3) and components within a QKD-capable network node. It relates to a network node with a structural level (1) of a manufacturer-specific key management system, i.e., a key management system (6; 6') whose characteristics are determined by the manufacturer of the QKD system, with a structural level (2) of a provider-specific key management system (8; 8'), i.e., a key management system whose characteristics are determined by the operator of the network node, and with an application level (3) to which quantum keys are provided for secure data exchange via one of the layers of the OSI model.According to the invention, one or more quantum keys within the network node, namely from the structure level (1) to be stored in a key memory (7; 7') to the structure level (2) or from the structure level (2) to the application level (3) for the encryption of application data, are each quantum-safe encrypted and transmitted using a PQC encryption method.