Secure Element Network Blocking for Country-Specific 2G Roaming
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Solution Overview
Problem
Existing telecommunication terminals are vulnerable to attacks from fake base stations in 2G networks due to lack of mutual authentication and security, posing a risk especially in regions where 2G networks are still prevalent, and current solutions fail to adequately protect against such threats.
Innovation Solution
Implementing a telecommunication terminal with a secure element that uses GPS data and a digital map to determine its location, storing a list of forbidden network generations or radio access technologies by country, and requiring user consent before connecting to potentially insecure networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminals are allowed to connect to 2G networks for international roaming, then connectivity is maintained in countries where 2G is still operational, but security vulnerabilities are introduced due to lack of mutual authentication and susceptibility to fake base station attacks
Solution Approach 1:
The patent implements location-aware network selection by storing a digital map of countries and their supported network generations in the secure element. The terminal determines its geographical location using GPS data and applies country-specific access policies, allowing 2G connectivity only in countries where it is still operational while blocking it in countries where it has been phased out. This resolves the contradiction by making network access adapt to local conditions rather than applying a uniform policy globally.
Solution Approach 2:
The patent introduces an intermediary security mechanism that acts between the terminal and the network. The secure element stores a file containing a list of countries and their allowed network generations, and this intermediary layer validates whether connecting to a detected network (e.g., 2G) is permitted based on the terminal's location. This intermediary prevents direct connection to insecure networks while maintaining connectivity to secure networks, resolving the security versus compatibility contradiction.
2Reliability
If terminals use GPS data and location-based policies to block 2G networks, then security is improved by preventing connections to fake base stations, but device complexity increases due to additional location determination and policy management requirements
Solution Approach 1:
The patent implements self-service by storing the digital map of countries and their network generation policies directly in the secure element of the terminal. The terminal autonomously determines its location using GPS data and applies the appropriate access policies without requiring external intervention or complex centralized management. This reduces system complexity by making the security mechanism self-contained and automatic rather than requiring external policy management infrastructure.
Solution Approach 2:
The patent applies preliminary action by pre-storing the list of countries and their allowed network generations in the secure element before the terminal needs to make network selection decisions. This pre-configured data allows the terminal to quickly determine whether connecting to a detected network is permitted based on its location, without requiring real-time policy retrieval or complex decision-making processes, thus reducing operational complexity.
Data Source
AI summary
The invention proposes a telecommunication terminal comprising a secure element, the secure element or the telecommunication terminal comprising a file comprising a list of countries and, for each country, a list of at least a generation of networks or radio access technologies to which the telecommunication terminal is forbidden to connect, the telecommunication terminal, in presence in one of these countries, being forbidden to connect to any network of a generation of a network or radio access technology listed in the list.