Chameleon Hash Access Control for Decentralized Data Ownership

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Solution Overview

Problem

Existing decentralized ledger systems face challenges in efficiently managing data ownership, access, and transfer due to limitations in consensus protocols like Proof-of-Work and Proof-of-Stake, leading to inefficiencies in verifying transactions and maintaining data integrity.

Innovation Solution

Implementing chameleon hash functions to enable secure decentralized data ownership and access management, allowing WTRUs to register, provide access, revoke, and transfer data ownership using chameleon hash collision public parameters, and interacting with access control entities for verification.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If Proof-of-Work or Proof-of-Stake consensus protocols are used for verification, then data integrity is maintained, but transaction verification efficiency deteriorates

Engineering Contradiction:

Improvedata integrityVSAvoidtransaction verification efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent introduces an access control entity as an intermediary between data owners and data consumers. This entity manages access control lists and verification requests, reducing the computational burden on the distributed ledger system while maintaining security. The intermediary handles routine access control operations, allowing the consensus protocol to focus only on critical verification tasks.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The verification process is segmented into multiple components: data registration, access control list management, and transaction verification. By dividing the verification workload into discrete manageable tasks handled by different entities (data owners, access control entities, and consensus nodes), the system improves overall verification efficiency without compromising data integrity.

Inventive Principle:

Principle #1Segmentation

2Reliability

If decentralized ledger systems are used for data ownership management, then data security is improved, but system complexity increases

Engineering Contradiction:

Improvedata securityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The access control entity serves multiple functions: it manages access control lists, processes verification requests, and coordinates with the distributed ledger system. This multi-functional approach reduces the number of separate components needed in the system, thereby reducing overall complexity while maintaining decentralized security.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Data owners can independently register their data and manage their own access control lists without requiring complex centralized management. The system enables self-service operations where participants can autonomously perform common tasks, reducing the complexity of system administration and coordination.

Inventive Principle:

Principle #25Self-service

3Reliability

If chameleon hash functions are used for ownership verification, then data access security is enhanced, but computational overhead increases

Engineering Contradiction:

Improvedata access securityVSAvoidcomputational overhead

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Chameleon hash values and access control lists are pre-computed and stored during data registration. This preliminary action allows verification operations to use these pre-computed values rather than performing full cryptographic computations during each access request, significantly reducing computational overhead while maintaining security.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses lightweight verification tokens and pre-computed hash values that can be quickly generated and discarded for each verification operation. These disposable verification objects require minimal computational resources compared to full cryptographic proofs, reducing the energy cost of frequent access verifications.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS20250286716A1Methods, architectures, apparatuses, and systems for decentralized data control and access management

Publication Date: 2025.09.11 INTERDIGITAL PATENT HOLDINGS INC

AI summary

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for decentralized data control and access management. For example, a data owner may perform a subscription procedure to obtain verification credentials and an index (e.g., address, identifier) to public data control and access information. The data owner may perform a registration procedure to register ownership of data using the public data control and access information. The public data control and access information may include a public key. The public key is paired with a private trapdoor key to form a key pair. The data owner and a data consumer may perform an access procedure to grant access to registered data. For example, the registration procedure may verify collisions between a token hash, a data hash, and a data owner hash based on use of the key pair.