Decentralized P2P Trust via Signed Transaction Envelopes

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Solution Overview

Problem

Conventional peer-to-peer (P2P) transactions are challenging due to the anonymity of users, making it difficult to ascertain the trustworthiness of other network users, thereby increasing the risk of unsatisfactory or harmful interactions.

Innovation Solution

A method involving the use of public and private keys to create and verify transaction envelopes, which include feedback from users, allowing third parties to assess the trustworthiness of network users without relying on a central server, by signing transaction details and feedback to ensure authenticity and prevent forgery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If users engage in anonymous P2P transactions, then transaction freedom and network accessibility are improved, but trustworthiness assessment and transaction safety deteriorate

Engineering Contradiction:

Improvetransaction freedomVSAvoidtrustworthiness assessment

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where users provide transaction feedback about each other, creating a reputation system. This feedback is stored and can be queried by third parties to assess trustworthiness, thereby maintaining anonymous transactions while enabling reliability assessment through accumulated feedback data.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent introduces feedback as an intermediary element between direct user interactions. Instead of users needing to know each other directly, the feedback system mediates trust assessment, allowing anonymous transactions while providing reliability information through the feedback mechanism.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If feedback is stored centrally, then trust assessment accuracy is improved, but system vulnerability to attacks and single points of failure worsen

Engineering Contradiction:

Improvetrust assessment accuracyVSAvoidsystem vulnerability

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent segments the feedback storage system into distributed copies across multiple nodes in the P2P network. Each user maintains local feedback data, and the system provides interfaces for querying this distributed feedback, eliminating single points of failure while maintaining trust assessment accuracy through redundant storage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements copying of feedback data across multiple distributed nodes rather than storing it centrally. This creates redundant copies of the same feedback information throughout the network, ensuring availability and resistance to attacks while maintaining accurate trust assessment through consistent data replication.

Inventive Principle:

Principle #26Copying

3Reliability

If feedback is made publicly accessible, then third-party trust verification is improved, but user privacy and feedback manipulation risks worsen

Engineering Contradiction:

Improvetrust verificationVSAvoidfeedback manipulation risk

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent introduces cryptographic signatures as an intermediary mechanism between feedback generation and verification. Users sign feedback with their private keys, and the system verifies authenticity using public keys, allowing public access to feedback while preventing manipulation through cryptographic authentication.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces manual feedback verification mechanisms with cryptographic verification. Instead of relying on trust in individual feedback sources, the system uses digital signatures and public key infrastructure to automatically verify feedback authenticity, eliminating manipulation risks while maintaining public accessibility.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS7490755B2Method and program for establishing peer-to-peer karma and trust

Publication Date: 2009.02.17 INTERNATIONAL BUSINESS MACHINE CORPORATION

AI summary

One embodiment of the present method and program for establishing peer-to-peer karma and trust by a first user in a network includes engaging in a transaction with at least a second user in the network, where the engaging includes: sending to the second user an initial transaction envelope including a first set of transaction details, wherein the initial transaction envelope is signed using a private key for the first user, receiving from the second user an appended transaction envelope, the appended transaction envelope including the first set of transaction details and a second set of transaction details, and executing the transaction in accordance with the appended transaction envelope. Feedback is exchanged with the second network user regarding the transaction, where a copy of the feedback is maintained locally by at least one of the first user and the second user.