Biometric Blockchain SIM Transfers for Trustless Reidentification
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Solution Overview
Problem
Current SIM swap fraud prevention methods cause service disruptions, compromise subscriber privacy, and rely heavily on third-party verification, which are inadequate against sophisticated social engineering attacks.
Innovation Solution
A system utilizing biometric user inputs to create a secure sketch and cryptographic keys, integrated with a smart contract on a blockchain, enabling secure and seamless SIM transfer without relying on physical access or sharing sensitive personal information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional SIM swap prevention methods are used, then fraud detection capability is improved, but service disruption increases and subscriber privacy is compromised
Solution Approach 1:
The patent replaces traditional mechanical verification methods (physical SIM card inspection, in-person identification) with biometric authentication and blockchain-based smart contracts. The system uses cryptographic keys derived from biometric data to enable seamless SIM transfers without service disruption, while the blockchain provides fraud detection through immutable recording of transfer conditions.
Solution Approach 2:
The patent introduces a blockchain as an intermediary between the subscriber and the mobile network operator. The smart contract on the blockchain serves as a mediator that automatically verifies transfer conditions using biometric authentication, eliminating the need for direct human verification and reducing service disruption while maintaining security.
2Reliability
If third-party verification is used for SIM transfer, then authentication reliability is improved, but subscriber privacy is compromised and service disruption increases
Solution Approach 1:
The patent enables self-service authentication where the subscriber's biometric data is used to generate cryptographic keys that automatically authenticate their identity. The smart contract on the blockchain executes automatically when transfer conditions are met, eliminating the need for third-party verification and protecting subscriber privacy by keeping authentication data decentralized and encrypted.
3Reliability
If biometric authentication and blockchain are used, then fraud prevention capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the complex authentication process into distinct modular components: biometric data collection, secure sketch generation, cryptographic key derivation, smart contract deployment, and transfer condition verification. Each component operates independently and can be implemented separately, reducing overall system complexity while maintaining high fraud prevention capability.
Data Source
AI summary
According to an aspect, there is provided an apparatus for performing the following. The apparatus receives a smart contract template from a network node of a mobile network operator connected to a blockchain. A subscriber identity module of the apparatus has a subscription to a service of the mobile network operator. The apparatus creates, based on one or more biometric user inputs, a secure sketch. The apparatus generates a random seed and, based on the secure sketch and one or more further biometric user inputs, a first cryptographic key. The apparatus encrypts the random seed using the first cryptographic key to form ciphertext. The apparatus creates a transfer condition for a transfer of the subscription when an input matches the ciphertext. The apparatus appends the secure sketch, random seed, ciphertext and transfer condition to the smart contract template. The apparatus transmits the smart contract template to the network node.