Fake Base Station SMS Detection via MSISDN Comparison
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Solution Overview
Problem
Current methods for identifying fake base station short messages are complex and require additional user operations, leading to unfriendly user experiences.
Innovation Solution
A communication system and method that involves modifying the short message format to include a receiver address field with the receiver's MSISDN, allowing the receiver terminal to detect fake base station messages without requiring additional user actions by comparing the included MSISDN with the local MSISDN, and controlling the message visibility accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional method using preset cryptograms is used to identify fake base station short messages, then the detection accuracy is improved, but the device complexity and user operation burden increase
Solution Approach 1:
The patent extracts the essential identification element (receiver address field containing MSISDN) from the complex cryptogram verification process. Instead of requiring full cryptogram presetting and verification, the solution isolates the receiver address field as the key authentication element, significantly simplifying the identification mechanism while maintaining detection accuracy
Solution Approach 2:
The receiver terminal automatically performs the authentication by extracting and verifying the receiver address field against its own MSISDN without requiring user intervention. The system serves itself by using the terminal's existing MSISDN information for verification, eliminating the need for users to preset cryptograms or perform additional operations
2Reliability
If the conventional method requiring user presetting of cryptograms is used, then the detection capability is improved, but the ease of operation deteriorates
Solution Approach 1:
The receiver terminal pre-stores its own MSISDN information, which is naturally assigned by the network. This preliminary availability of identification data eliminates the need for users to perform presetting operations during message reception, making the system both capable and easy to use
Solution Approach 2:
The terminal uses its own MSISDN for self-verification against the receiver address field in incoming messages. This self-service mechanism requires no user input or additional operations, making the detection process transparent and user-friendly while maintaining high detection capability
3Ease of operation
If the short message format is modified to include receiver address field with MSISDN, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The receiver address field in the short message protocol serves dual functions: it acts as a standard routing address for message delivery and simultaneously serves as an authentication element for fake base station detection. This multi-functionality eliminates the need for separate authentication fields, maintaining format standardization while enabling simplified detection
Solution Approach 2:
The receiver address field containing MSISDN acts as an intermediary element that bridges message routing and authentication functions. By using this existing protocol element for both purposes, the solution avoids increasing format complexity while enabling straightforward verification through comparison with the terminal's stored MSISDN
Data Source
AI summary
A method includes: extracting a data value of receiver address field from a short message; wherein the short message sent by the short message center includes receiver address field, and the data value of the receiver address field includes the receiver's MSISDN; if the short message does not include the receiver address field or the data value is not local MSISDN such as the MSISDN of the receiver terminal, determining the short message as a fake base station short message. The MSISDN used in the present disclosure is an existing feature of the sender terminal and the receiver terminal without requiring the user to perform additional operations. Moreover, neither the short message center nor the receiver terminal needs to acquire the preset cryptogram in the gateway. Therefore, the present disclosure accurately detects a fake base station short message without requiring the user to perform additional operations.