Distributed Packet Trust Checks Without Central Authority

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Solution Overview

Problem

In wireless distributed communication systems, ensuring trustworthiness of packets without reliance on a designated trusted authority is challenging, as only designated authorities can perform trustworthiness checks on open trust packets, limiting the ability of other terminals to verify packet trust.

Innovation Solution

Implementing a method where terminals share a group code and secret key to generate group trust fields, allowing terminals to perform trustworthiness checks independently, and periodically updating the secret key for enhanced security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If open trust communication scheme is used with designated trusted authority, then trustworthiness verification is possible through centralized authority, but terminals without authority designation cannot perform trustworthiness checks

Engineering Contradiction:

Improvetrustworthiness verification capabilityVSAvoidterminal autonomy in verification

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent segments the trust verification function from the centralized trusted authority and distributes it to individual terminals. Each terminal is equipped with its own secret key and group code, enabling it to independently generate and verify group trust fields without relying on external authority designation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Terminals perform self-service trust verification by using their own secret keys and group codes to generate group trust fields. The verification process is autonomous, with each terminal capable of independently confirming the trustworthiness of received packets without requiring assistance from a trusted authority.

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If secret key is shared between terminals for group trust field generation, then terminals can perform independent trustworthiness checks, but security may be compromised if key management is not updated

Engineering Contradiction:

Improveterminal autonomy in verificationVSAvoidsecurity of shared secret key

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements periodic secret key updates through secondary secret keys. The trusted authority generates new secret keys at regular intervals and distributes them to terminals, ensuring that the shared secret key remains secure over time. This periodic renewal prevents long-term key exposure risks while maintaining terminal autonomy in verification.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12452659B2Method and apparatus for guaranteeing trust of packet in distributed communication system

Publication Date: 2025.10.21 ELECTRONICS & TELECOMM RES INST

AI summary

An operation method of a first communication node in a wireless distributed communication system may comprise: providing a group code and a primary secret key to a third communication node via a second communication node; receiving, from the third communication node, a first packet including a first group trust field through wireless distributed communication, the first group trust field being generated using the group code and the primary secret key; and performing a trustworthiness check of the received first packet by using the first group trust field included in the received first packet, the group code, and the primary secret key.