Published: 2025-12-01

Super Encryption Cryptography for Land Certificate Data Security: A Case Study of the Jayapura City Land Agency

DOI: 10.35870/ijsecs.v5i3.5652

Front Cover IJSECS VOLUME 5 NOMOR 3 DESEMBER 2025

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Abstract

This study introduces a lightweight, reproducible super-encryption framework designed to protect land certificate owner data at the Jayapura City Land Office. The system combines two classical algorithms—Rail Fence Cipher for transposition and Vigenère Cipher for substitution—through a structured, layered encryption pipeline implemented in Python. Testing was conducted on 50 simulated certificate owner names (10–15 characters each) under controlled conditions (Intel i5, 8 GB RAM, Windows 10). Black-box validation demonstrated 100% decryption accuracy with sub-10 ms total processing time per record. Robustness assessments revealed an average Shannon entropy increase of 41.6% and an avalanche rate of 47.8%, indicating enhanced ciphertext randomness. Results confirm that strategically layering classical ciphers delivers reliable confidentiality and integrity for small-scale, non-transactional datasets characteristic of land administration offices operating under resource constraints. The research offers a transparent, replicable model for securing identity fields and demonstrates the practical viability of super-encryption as a computationally efficient cryptographic solution for local government digital systems

Keywords

Cryptography ; Super Encryption ; Data Security ; Rail Fence Cipher ; Vigenère Cipher ; Land Administration

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