Caller ID Verification via Real-Time Text Challenge
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Solution Overview
Problem
Conventional methods for filtering out fake Caller IDs in incoming calls are ineffective, as they rely on blacklisting and whitelisting, which can be easily circumvented by telemarketers using falsified numbers, and are time-consuming, allowing scammers to pass CAPTCHA tests and evade fines.
Innovation Solution
An electronic device and method for real-time verification of Caller IDs by transmitting a verification text message to the caller's number, requiring a timely response to validate the ID, allowing genuine calls to connect while routing suspicious calls to voicemail or blocking them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blacklisting and whitelisting methods are used to filter fake Caller IDs, then call filtering capability is improved, but the system becomes easily circumvented by telemarketers using falsified numbers and requires continuous updates
Solution Approach 1:
The system performs preliminary verification of Caller ID authenticity before allowing calls to connect. A verification message is sent to the Caller ID number prior to call establishment, and the caller must respond with a verification code to prove ownership. This preliminary action prevents fake Caller IDs from being used in the first place, making blacklisting unnecessary.
Solution Approach 2:
The system implements a feedback mechanism where verification messages are sent to potential callers and their responses are evaluated in real-time. The verification code returned by the caller is checked against the originally sent code, providing immediate feedback on Caller ID authenticity. This continuous feedback loop ensures ongoing reliability without requiring manual blacklist updates.
2Measurement precision
If verification messages are sent to all incoming callers, then fake Caller ID detection accuracy is improved, but call establishment time increases due to verification delays
Solution Approach 1:
The system applies verification selectively rather than universally. Verification messages are sent based on risk assessment criteria such as whether the Caller ID is in a whitelist, matches the called number, or shows other indicators of legitimacy. This partial application of verification maintains high detection accuracy for suspicious calls while allowing genuine calls to connect immediately without delay.
Solution Approach 2:
The system takes preliminary anti-action by pre-validating Caller ID numbers through whitelist mechanisms and number-matching checks before verification messages are sent. Calls from pre-validated sources are allowed to proceed without additional verification delays, while only suspicious calls undergo the full verification process. This preliminary anti-action prevents legitimate calls from being subjected to unnecessary verification delays.
Data Source
AI summary
An electronic device and method for real-time verification of Caller IDs for live-human and robot call filtering is provided. A first electronic device receives an incoming first call from a second electronic device associated with a Caller identification (ID). The first electronic device transmits a verification text message to the second electronic device using the Caller ID, while the first call is still incoming. The first electronic device receives a response to the verification text message and compares the received response with a pre-defined response. If the response is correct and received within a predefined time, the first electronic device allows the call to connect. If a correct response is received beyond the predefined time, the Caller ID is added to a whitelist so that a next call from the same Caller ID is received automatically. In such case, the current first call is redirected to a voicemail system.