Message-Verified User Opt-In for Spam-Resistant Service Access

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Solution Overview

Problem

Existing opt-in methods, such as double opt-in and email payment gateways, are inefficient, cumbersome, and insecure, lacking verification of user intent and vulnerability to spamming.

Innovation Solution

A method and system utilizing a server system with computation means to validate user opt-ins through message evaluation and address verification, ensuring secure and efficient opt-in processes via communication protocols and digital signatures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If double opt-in method is used to verify user consent, then reliability of opt-in validation is improved, but device complexity and time consumption increase

Engineering Contradiction:
Improveopt-in validation reliabilityVSAvoidopt-in process complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the verification step from the traditional double opt-in process. Instead of requiring users to click a confirmation link (which adds complexity and time), the system only sends a single opt-in email and verifies delivery through automated means, removing the cumbersome confirmation click step while maintaining validation reliability

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The system performs self-verification by automatically checking whether the opt-in email was successfully delivered to the user's address. The computation means autonomously validates the opt-in by confirming email delivery status, eliminating the need for manual user confirmation actions and reducing process complexity

Inventive Principle:
Principle #25Self-service

2Ease of operation

If traditional email opt-in methods are used, then ease of operation is improved, but security against spamming deteriorates

Engineering Contradiction:
Improveopt-in process easeVSAvoidspam vulnerability
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The system implements feedback by monitoring and analyzing the delivery status of opt-in emails. The computation means receives feedback about whether emails were successfully delivered and uses this information to validate opt-ins, creating a closed-loop verification system that maintains security while preserving ease of operation

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system performs preliminary verification by checking email delivery status before considering the opt-in valid. By pre-verifying that the opt-in email reached the user's inbox, the system prevents spam abuse while maintaining a simple single-step opt-in process for legitimate users

Inventive Principle:
Principle #10Preliminary action

3Measurement precision

If manual opt-in collection is used for service information, then measurement precision of user intent is improved, but productivity deteriorates

Engineering Contradiction:
Improveuser intent verification accuracyVSAvoidopt-in processing efficiency
Core Design Contradiction:
Measurement precisionVSProductivity

Solution Approach 1:

The patent replaces manual opt-in collection with an automated electronic system. The computation means automatically sends opt-in emails, monitors delivery status, and validates user consent without human intervention, substituting mechanical manual processes with automated computational processes that maintain precision while dramatically improving productivity

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system introduces an intermediary verification mechanism - the opt-in email delivery confirmation - that bridges the gap between automated processing and accurate user intent measurement. This intermediary validation step ensures precise intent verification while enabling high-volume automated processing

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentEP4614421A1Method for obtaining an opt-in of a user and an opt-in system therefor
Publication Date: 2025.09.10 KAJOMI GMBH
  • EP4614421A1 patent drawingFigure 1
  • EP4614421A1 patent drawingFigure 2
  • EP4614421A1 patent drawing

AI summary

The invention relates to a method for obtaining an opt-in of a user, more particularly an opt-in of a user for providing a service to the user, the method to be implemented using a server system (10) having a computation means (12) which is configured to communicate with a user device (14). The method comprises the steps of providing service information including a server system address; sending, by the user device (14), a message from a user address to the server system address by an instruction of the user; receiving, by the computation means (12), the message sent from the user address to the server system address; validating, by the computation means (12), whether the message represents an opt-in by the steps of evaluating whether the message includes an opt-in statement; and verifying whether the message was allowed to be sent from the user address. The invention further relates to an opt-in system (100) therefor.