Electronic Know Your Customer (e-KYC) systems are essential for financial institutions to verify customer identities. However, traditional e-KYC methods face significant challenges in balancing security, privacy, and efficiency, particularly when handling large volumes of sensitive data.
We addresses these challenges by integrating Searchable Symmetric Encryption (SSE) with blockchain technology. Our approach significantly improves the efficiency of searching encrypted data while maintaining robust security measures.
Key Innovations
We enhanced the existing TrustBlock framework by incorporating a novel Pseudorandom Number Generation (PRNG) method called Turbulence Padded Chaotic Map (TPCM). This approach combines two chaotic algorithms—Baker and Arnold—to create highly unpredictable encryption seeds.
The system allows users to securely search through encrypted documents stored on a blockchain without compromising data privacy. This is achieved through a sophisticated token generation and verification process that maintains encryption throughout the search procedure.
Performance Improvements
Experimental results demonstrate that our proposed method significantly outperforms previous approaches when handling large datasets. While the traditional method may be slightly faster for small numbers of files (hundreds), the new system shows dramatic efficiency gains when searching thousands of files:
- At around 2,000 files, the proposed method takes only 0.39-1.2 seconds, compared to 4-5 seconds for previous methods
- With tens of thousands of files, the SSE approach keeps search times under 3 seconds, while traditional methods can require tens of seconds
The security analysis also confirmed that the TPCM method produces consistently high entropy values between 2.9 and 3.8, indicating strong randomness in the encryption seeds—a crucial factor for maintaining security in searchable encryption systems.
Further Information
If you are interested in the complete technical details of this research, the full paper "Reducing the e-KYC file searching time in the blockchain system using searchable symmetric encryption and turbulence padded chaotic map" is attached to this article.
The paper provides comprehensive information on the system architecture, mathematical foundations of the encryption methods, detailed experimental results, and security analysis.
The attached document includes all figures and algorithms referenced in this summary.
This approach to e-KYC systems demonstrates how advanced cryptographic techniques can enhance both security and efficiency in financial verification processes, particularly in blockchain-based decentralized environments.