Quantum Key Management with Automated PSK Rotation
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Solution Overview
Problem
The operational cost of quantum cryptographic communication systems is high due to the difficulty in securely managing encryption keys without relying on public key infrastructure (PKI), and periodic updates of pre-shared keys (PSKs) for transport security are time-consuming and error-prone.
Innovation Solution
A method for automatically updating pre-shared keys (PSKs) in key management systems using quantum key distribution networks, integrating key updates with encryption key provision protocols to reduce operational costs and ensure secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quantum key distribution is used to ensure secure communication without PKI, then communication security is improved, but operational cost increases
Solution Approach 1:
The system performs preliminary actions by automatically updating PSKs before they expire or are compromised. The key management device proactively generates and distributes new PSKs to information processing devices, preventing security vulnerabilities from developing while maintaining operational efficiency through automated scheduling and timing of key updates.
Solution Approach 2:
The system implements self-service through automated key management where the key management device independently handles PSK generation, distribution, and rotation without requiring manual human intervention. The information processing devices automatically receive and implement new PSKs, eliminating the need for operators to manually manage cryptographic keys while maintaining security standards.
2Reliability
If manual PSK updates are performed for transport security, then security is maintained, but time consumption and error rate increase
Solution Approach 1:
The system implements self-service through automated key management where the key management device independently handles PSK generation, distribution, and rotation without requiring manual human intervention. The information processing devices automatically receive and implement new PSKs, eliminating the need for operators to manually manage cryptographic keys while maintaining security standards.
Solution Approach 2:
The system incorporates feedback mechanisms where the key management device monitors the security state and operational parameters of the quantum cryptographic communication system. Based on this feedback, the system dynamically adjusts key update timing and distribution, ensuring security requirements are met while optimizing operational efficiency and minimizing unnecessary key rotations.
3Reliability
If frequent PSK updates are performed, then security is enhanced, but operational complexity increases
Solution Approach 1:
The key management device serves multiple functions: it generates PSKs, distributes them to information processing devices, monitors security requirements, schedules updates, and manages key lifecycles. This multi-functional approach consolidates complex key management operations into a single unified system, reducing overall operational complexity while maintaining enhanced security through frequent, coordinated PSK updates.
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
The method reduces operational costs and enhances security by automating PSK updates, ensuring secure key transport without the need for PKI, thus maintaining communication security efficiently.
Implementation Method 1
A quantum key distribution (Quantum Key Distribution Network; QKD) technology is a technology by which a key for encrypted data communication is securely shared between QKD devices connected by an optical fiber using continuously transmitted single photons
Data Source
AI summary
According to one embodiment, a key management device is connected to a first application by a wired communication scheme or a wireless communication scheme. The key management device includes a processor implemented by at least one processing device and configured to transmit a response including an application key and PSK information indicating a pre-shared key (PSK) used to establish a first communication session between the first application and the key management device to the first application, when receiving a request for the application key used to encrypt or decrypt communication in the first application.