Split Ledger License Verification for Offline Software Access

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Solution Overview

Problem

Large organizations face challenges in verifying software usage across multiple users due to offline work and bulk contracts that need updating as organizational conditions change, with existing systems lacking effective methods to track and manage software licenses efficiently.

Innovation Solution

A split ledger licensing system that utilizes a passed ledger and a hash ledger to securely manage software licenses, ensuring accurate tracking and authorization through a trusted third-party service (KaaS) while maintaining privacy and security, with smart contracts for automated license management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional centralized license management systems are used, then software vendors can track usage centrally, but the system becomes vulnerable to single points of failure and fraud

Engineering Contradiction:
Improvelicense management reliabilityVSAvoidsystem architecture complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the centralized license management system into distributed ledger nodes across multiple entities (software vendors, licensees, and trusted third parties). Each node maintains a copy of the license ledger, eliminating single points of failure while distributing system complexity across independent participants rather than concentrating it in one centralized server.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces a trusted third party (TTP) as an intermediary that issues and verifies license keys without maintaining centralized control over usage data. The TTP mediates between vendors and licensees by signing license keys with its private key, allowing verification through public key cryptography while preserving privacy and reducing the need for direct trust between opposing parties.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Adaptability or versatility

If bulk contracts allow multiple users access to software, then organizational flexibility improves, but tracking and updating licenses becomes difficult

Engineering Contradiction:
Improvelicense flexibilityVSAvoidlicense tracking ease
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent implements self-service license management where each user device automatically verifies its license status by checking the distributed ledger and validating license keys cryptographically. The system autonomously handles license issuance, renewal, and revocation without requiring manual administrative intervention, making bulk contract management as easy as individual license management.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent establishes continuous feedback loops where licensees periodically verify their license status against the updated ledger, and the system automatically notifies stakeholders of license expirations or revocations. This real-time feedback mechanism ensures bulk contract compliance without manual tracking while maintaining organizational flexibility.

Inventive Principle:
Principle #23Feedback

3Ease of operation

If users work offline without network connection, then software usability improves, but license verification becomes problematic

Engineering Contradiction:
Improvesoftware usabilityVSAvoidlicense verification reliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The patent enables preliminary license verification by allowing users to download and cache license ledgers and verification credentials before going offline. The trusted third party pre-signs license keys and distributes verification data in advance, enabling devices to perform autonomous license validation without real-time network connectivity while maintaining verification reliability.

Inventive Principle:
Principle #10Preliminary action

4Measurement precision

If centralized systems store all license data, then verification is straightforward, but security risks and fraud opportunities increase

Engineering Contradiction:
Improvelicense verification accuracyVSAvoidsecurity vulnerabilities
Core Design Contradiction:
Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent segments centralized license data storage into distributed copies across multiple ledger nodes. No single entity holds complete control over all license information, reducing security vulnerabilities associated with centralized databases while maintaining verification accuracy through cryptographic consensus mechanisms that ensure data integrity across the distributed network.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS12585737B2Split ledger software license platform
Publication Date: 2026.03.24 AT&T INTELLECTUAL PROPERTY I L P
  • US12585737B2 patent drawing
  • US12585737B2 patent drawing
  • US12585737B2 patent drawing

AI summary

Aspects of the subject disclosure may include, for example, a processing system including a processor; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, including requesting a license for software from first equipment of a license holder; receiving a passed ledger associated with the license from the first equipment of the license holder, wherein the passed ledger comprises a latest block; receiving a hash value for the latest block from a software vendor of the software; calculating a hash value for the latest block; and responsive to the hash value provided by second equipment of the software vendor matching the hash value calculated for the latest block: executing the software. Other embodiments are disclosed.