A Lightweight Approach to Data Protection: Implementing Base64 Encryption and Decryption in Python

Imelda Maretta Putri, Albertus Bobby Nugroho, Ans’ Akmal Surya Myriano

Abstract


This paper presents a lightweight data protection method combining Base64 encoding with a modular linear congruential transformation. The encryption algorithm f(x) = (7x + 23) mod 256 was tested on the sample string "Polke," achieving accurate encryption and decryption with minimal computational cost. Experiments show transformation rates up to 215.84%, perfect data recovery, and negligible resource usage (processing time <1 ms, memory 0.1 KB, CPU <1%). Scalability tests demonstrate linear performance up to 5000 characters. The proposed system is suitable for basic data security in resource-constrained applications.

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References


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