TLS Authentication Using DTCP Certificates for Device Compatibility

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Solution Overview

Problem

Existing authentication methods, such as those using X.509 and SAML certificates, limit device authentication to those possessing these certificates, excluding devices like televisions that may not have them, necessitating a need for alternative authentication mechanisms.

Innovation Solution

Utilizing Digital Transmission Content Protection (DTCP) certificates within Transport Layer Security (TLS) protocol to establish TLS tunnels for mutual authentication, enabling devices without X.509 or SAML certificates to authenticate securely.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If X.509 or SAML certificates are used for authentication, then security and data integrity are improved, but device compatibility deteriorates because devices like televisions cannot authenticate without these certificates

Engineering Contradiction:

Improveauthentication securityVSAvoiddevice compatibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent introduces DTCP certificates as an intermediary authentication mechanism that bridges the gap between secure authentication requirements and device compatibility. DTCP certificates serve as a mediator that allows devices without X.509 or SAML certificates (such as televisions) to participate in secure TLS authentication, thus maintaining both security and broad device compatibility

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If TLS protocol with X.509 certificates is implemented, then privacy and data integrity are improved, but ease of operation deteriorates due to complex certificate management requirements

Engineering Contradiction:

Improvedata integrityVSAvoidcertificate management

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent employs DTCP certificates that can be more easily obtained and managed compared to traditional X.509 certificates. These certificates are designed to be simpler to acquire and manage, reducing the operational burden while maintaining the security benefits of TLS protocol

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS12506726B1Certificate authentication

Publication Date: 2025.12.23 CABLE TELEVISION LAB INC

AI summary

Authenticating devices utilizing Transport Layer Security (TLS) protocol to facilitate exchange of authentication information or other data to permit or otherwise enable access to services requiring authentication credentials, certificates, tokens or other information. The authentication may utilize Digital Transmission Content Protection (DTCP) certificates, Diffie-Hellman (DH) parameters or other information available to the authenticating devices, optionally without requiring device requesting authentication to obtain an X.509 certificate.