Zero-Knowledge DRM Player for Privacy-Preserving Content Access

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Solution Overview

Problem

Existing digital rights management (DRM) systems fail to provide meaningful privacy for consumers while ensuring content protection, as they often require third-party access to user data and do not effectively prevent unauthorized copying or usage of licensed content.

Innovation Solution

A cryptographically assured distributed private cloud system using zero-knowledge protocols and cryptocurrency smart contracts ensures content protection for owners and privacy for users, enabling secure and anonymous transactions for licensed content, such as multimedia content, by verifying the integrity of content media player applications and enforcing usage conditions without revealing user information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If digital rights management (DRM) systems are implemented to protect content from unauthorized copying, then content protection is improved, but user privacy deteriorates because third parties gain access to user data and viewing habits

Engineering Contradiction:

Improvecontent protectionVSAvoiduser privacy

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent introduces zero-knowledge proofs as a cryptographic intermediary mechanism that enables content protection verification without exposing user viewing habits or personal information to third parties. The system uses trusted execution environments (TEEs) and cryptographic protocols to mediate between content owners requiring protection and users requiring privacy, allowing integrity verification while maintaining information confidentiality.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces traditional mechanical/manual DRM verification systems with cryptographic and software-based zero-knowledge proof mechanisms. This substitution eliminates the need for third-party access to user data while maintaining content protection, using mathematical proofs instead of physical or manual verification processes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Device complexity

If manual and basic automated application scanning is used to assure against backdoors, then implementation complexity is reduced, but security effectiveness deteriorates because existing solutions cannot provide meaningful privacy or strong assurance against piracy

Engineering Contradiction:

Improveimplementation complexityVSAvoidsecurity effectiveness

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent replaces manual and basic automated scanning with advanced cryptographic verification systems including zero-knowledge proofs and trusted execution environments. This substitution increases implementation complexity but dramatically improves security effectiveness by providing mathematically proven assurance against piracy while maintaining privacy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the verification parameter from simple application scanning to cryptographic proof verification. Instead of checking for obvious backdoors through scanning, the system uses zero-knowledge proofs to verify application integrity and privacy guarantees, transforming the nature of verification from heuristic to mathematical.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If third-party content managers have full knowledge of consumer viewing habits to provide services, then service quality is improved, but user privacy deteriorates because consumers lose control over their personal data

Engineering Contradiction:

Improveservice qualityVSAvoiduser privacy

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The patent introduces zero-knowledge proofs as a cryptographic intermediary that enables service providers to verify viewing behavior patterns without accessing actual user data. The system allows content managers to receive verified information about content consumption for service improvement while users maintain complete privacy over their viewing habits through cryptographic anonymity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11423498B2Multimedia content player with digital rights management while maintaining privacy of users

Publication Date: 2022.08.23 INTERNATIONAL BUSINESS MACHINE CORPORATION

AI summary

A system, method, and computer readable storage medium configured for delivering services from a server to ensure multimedia content control by content providers (i.e. reduce piracy) and to ensure privacy by content users is described. The method begins with executing at least a portion of a content media player application to the device using a zero-knowledge protocol to ensure privacy of the user. Examples of zero-knowledge verifiable computing are succinct computational integrity and privacy (SCIP) protocol, zero-knowledge succinct non-interactive argument of knowledge (zk-snark) protocol, and probabilistically checkable proof (PCP) protocol. The content media player application includes digital right management technology using zero-knowledge verifiable computing to enforce usage conditions on the multimedia content. A response is received from the user device that the content media player application has executed on the user device. Based upon the response indicating a successful execution, accessing the multimedia content by the content media player application.