Quantum Message Authenticator for Low-Latency Infrastructure Security
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Solution Overview
Problem
Conventional cryptography and quantum key distribution (QKD) systems face challenges in providing low-latency authentication with high security in infrastructure systems, such as electric grids and financial trading systems, which require assurances of authenticity, confidentiality, and freshness without exceeding latency constraints.
Innovation Solution
The implementation of message authenticators that use quantum keys for low-latency authentication, allowing for stream-wise operations and variable message lengths, incorporating cyclic redundancy code (CRC) and hashing operations with Toeplitz matrices, to facilitate secure communication in infrastructure systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cryptography is used for authentication, then security can be maintained, but latency constraints cannot be met in infrastructure systems
Solution Approach 1:
The patent changes the fundamental parameter of authentication from conventional cryptographic algorithms to quantum key distribution-based authentication. This parameter change enables both high security and low latency by using quantum mechanical properties (superposition, entanglement) that allow simultaneous authentication and key generation without the computational delays inherent in conventional cryptography.
Solution Approach 2:
The patent substitutes the mechanical/computational authentication system with a quantum mechanical system. Instead of using computational complexity (RSA, AES) for authentication, the system uses quantum states and measurements to achieve authentication, fundamentally replacing the underlying mechanism and enabling both security and speed requirements.
2Loss of time
If quantum key distribution is used for authentication, then low-latency authentication is achieved, but device complexity increases
Solution Approach 1:
The patent segments the authentication system into distinct functional modules: quantum key distribution component, authentication component, and encryption component. This segmentation allows each component to be optimized independently and simplifies the overall system architecture by separating the quantum mechanical operations from the cryptographic operations, making the complex system more manageable and implementable.
3Reliability
If conventional cryptography is used for multi-level security, then security can be provided, but adaptability to constrained resources is limited
Solution Approach 1:
The patent implements dynamic security levels that can adapt to the computational resources available. The system can dynamically adjust the complexity of cryptographic operations and the number of security levels based on the constraints of the implementing device, allowing quantum-secured authentication to be deployed in environments with varying resource availability while maintaining appropriate security for each context.
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 solution enables low-latency authentication with high security, supporting multi-level security and forward security, suitable for constrained resources, and is particularly valuable in infrastructure systems where conventional cryptography struggles to meet security and latency requirements.
Implementation Method 1
the quantum states are specially defined properties of photons such as pairs of polarization states
Implementation Method 2
A third party can, in theory, eavesdrop on the QC between the two parties. Such eavesdropping perturbs the QC
Data Source
AI summary
Message authenticators for quantum-secured communications facilitate low-latency authentication with assurances of security. Low-latency message authenticators are especially valuable in infrastructure systems where security and latency constraints are difficult to satisfy with conventional non-quantum cryptography. For example, a message transmitter receives a message and derives an authentication tag for the message based at least in part on an authenticator that uses one or more quantum keys. The message transmitter outputs the message and its authentication tag. A message receiver receives a message and authentication tag for the message. The message receiver derives a comparison tag for the message based at least in part on an authenticator that uses one or more quantum keys. The message receiver checks whether the message is authentic based on a comparison of the authentication tag and the comparison tag. In example implementations, the authenticator uses stream-wise cyclic redundancy code operations.