eToken Fingerprint Binding for Secure Cross-Host Authentication

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Solution Overview

Problem

Existing systems are vulnerable to attacks where attackers compromise client PKI stations using eTokens from other hosts, necessitating a method to prevent unauthorized use of these tokens across different devices.

Innovation Solution

A system and method that binds eTokens to specific client devices using unique fingerprint data, regenerates device fingerprints, and verifies matches or acceptable differences to ensure secure data transmission only occurs on authorized devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If eTokens are made portable and usable across different hosts, then ease of operation is improved, but security is worsened due to vulnerability to attacks where attackers compromise client PKI stations using eTokens from other hosts

Engineering Contradiction:

Improveportability of eTokenVSAvoidsecurity of PKI station

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system performs preliminary binding of the eToken to the client device before actual use. The binding information including device fingerprint and token identifier is stored in advance, creating a pre-established security association that prevents unauthorized use on different hosts while maintaining portability for authorized use

Inventive Principle:

Principle #10Preliminary action

2Reliability

If eTokens are bound to specific client devices using fingerprint data, then security is improved by preventing unauthorized use, but ease of operation is worsened due to restrictions on token movement

Engineering Contradiction:

Improvesecurity of eToken usageVSAvoidmobility of eToken

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The binding mechanism creates a localized security association between the eToken and specific device characteristics (fingerprint data). This local quality approach allows the token to be freely used on the authorized device while automatically preventing use on unauthorized devices, thus securing the token without imposing artificial movement restrictions

Inventive Principle:

Principle #3Local quality

3Reliability

If fingerprint verification is implemented to verify device identity, then security is improved, but device complexity is worsened due to additional verification steps

Engineering Contradiction:

Improveauthentication securityVSAvoidcomplexity of verification process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system creates a cryptographic copy or hash of the device fingerprint data and stores it binding information. Instead of storing or processing complex raw fingerprint data, the system uses these simplified representations for verification, reducing computational complexity while maintaining security through cryptographic equivalence

Inventive Principle:

Principle #26Copying

Data Source

PatentUS20260074892A1Token node locking with fingerprints authenticated by digital certificates

Publication Date: 2026.03.12 ARRIS ENTERPRISES LLC

AI summary

A system and method for receiving secure data in a client device. In one embodiment, the method comprises (a) receiving a token having a token ID and a digital certificate generated by a certificate authority (CA) having client device fingerprint data generated from client device parameters, (b) accepting a request in the client device to provide secure data to the client device, (c) regenerating the client device fingerprint data from the client device parameters, (d) determining, in the client device, differences between the client device fingerprint data of the digital certificate from the regenerated client device fingerprint data, and (e) transmitting a request to a secure data service to provide secure data based upon the determination.