Dynamic Subscription Identifier for Communication Terminal Privacy

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Solution Overview

Problem

Existing communication systems allow subscription identifiers to be traced, enabling unauthorized monitoring and tracking of user communications and location, which compromises user privacy.

Innovation Solution

A device and method that dynamically change subscription identifiers during registration in a communication network, allowing re-registration with new identifiers, and optionally changing call identifiers, to reduce the risk of tracing while maintaining communication functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a subscription identifier is transmitted during registration phase, then the terminal can access communication services, but the user becomes vulnerable to tracing and unauthorized monitoring

Engineering Contradiction:

Improveaccess to communication serviceVSAvoidtracing and unauthorized monitoring

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies dynamics by making the subscription identifier changeable over time. The terminal dynamically generates different subscription identifiers for different registration instances, transforming the static identifier into a dynamic one that adapts to prevent tracing while maintaining service access

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of the subscription identifier itself - from a fixed value to a variable value that changes based on registration time, terminal state, or other parameters. This parameter change allows the terminal to maintain service access while preventing unauthorized tracking

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If the subscription identifier is dynamically changed, then tracing is reduced, but the terminal must perform re-registration

Engineering Contradiction:

Improvetracing riskVSAvoidre-registration time

Core Design Contradiction:

Object-affected harmful factorsVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-generating multiple subscription identifiers and storing them in the terminal before they are needed. When tracing prevention is required, the terminal can immediately switch to a pre-prepared identifier without requiring time-consuming re-registration procedures

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates multiple copies of the subscription identifier in advance. These copied identifiers are stored locally in the terminal, allowing rapid switching between identifiers without needing to contact the network for generation or validation during the switching process

Inventive Principle:

Principle #26Copying

Data Source

PatentEP2638717B1Terminal and method for transmitting a subscription identifier

Publication Date: 2017.09.06 AIRBUS DEFENCE & SPACE SAS

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AI summary

Each terminal wishing to access a communication service implemented in a communication network transmits an identifier of subscription to this service during a phase of registration (3.1; 3.2) in the network. With each service subscription identifier is associated a call identifier for making it possible to call the terminal registered via the network. A system (1.2, 1.3) intended to register at least one terminal (1.4) from among a plurality of terminals (1.3; 1.4) in a telephony network comprises means of dynamic changing of service subscription identifier (3.11, 3.12, 3.13) and of associated call identifier (3.4, 3.5, 3.6), for at least one of said terminals, and means for reregistration (3.15) in said network of each terminal for which the service subscription identifier and the associated call identifier have been dynamically changed.