Nonce-Based Authentication for Low-Power Encrypted Communication
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Solution Overview
Problem
Zero-power devices face challenges in completing communication tasks due to high complexity in authentication and key agreement procedures, leading to energy depletion and poor availability.
Innovation Solution
A communication method involving a processor and memory that calculates a first key and authentication information based on a shared key and nonce, enabling efficient ciphertext data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional authentication and key agreement procedures are used, then security requirements are met, but energy consumption increases and device availability decreases
Solution Approach 1:
The patent changes the computational parameters of the authentication protocol by using pre-shared keys and simplified key derivation functions instead of complex mutual authentication algorithms. This reduces the calculation complexity and energy consumption while maintaining security through alternative cryptographic approaches that are better suited for resource-constrained devices.
Solution Approach 2:
The authentication process is segmented into distinct phases: initial key establishment, key derivation, and authenticated communication. By separating these functions and allowing the zero-power device to participate only in the lighter-weight key derivation and authenticated communication phases, the overall energy burden is reduced while security is maintained through the hierarchical key structure.
2Reliability
If traditional authentication and key agreement procedures are used, then security requirements are met, but communication delay increases
Solution Approach 1:
The patent employs preliminary action by pre-establishing shared keys between devices before the actual communication session. This allows the zero-power device to skip the computationally intensive mutual authentication phase and directly engage in key derivation and authenticated communication, significantly reducing authentication delay while maintaining security through the pre-configured cryptographic materials.
3Reliability
If zero-power devices participate in complex authentication, then security is maintained, but device availability decreases
Solution Approach 1:
The patent implements self-service by enabling the zero-power device to autonomously derive session keys from pre-shared materials without requiring complex real-time authentication exchanges. The device can independently complete the authentication process using stored cryptographic materials, eliminating the need for continuous power supply during authentication and improving availability for intermittent operation.
Data Source
AI summary
A communication method, a device, a computer-readable storage medium, a computer program product, and a computer program are provided. The method includes the following. A first device receives a first message, where the first message carries a nonce and first authentication information. The first device calculates a first key and second authentication information based on a first shared key and the nonce. When the first authentication information is the same as the second authentication information, the first device calculates ciphertext data based on the first key and data to be sent. The first device sends a second message, where the second message carries the ciphertext data.