Improved cryptographic security and performance analysis using an enhanced random substitution cipher algorithm compared to caesar cipher
Kanth Reddy G. S. Kiran, S. Loganayagi · 2026
This research introduces ERSCA as a new cryptographic solution that boosts security and speed compared to basic substitution ciphers especially the Caesar Cipher system. ERSCA implements an adaptive random substitution lookup system that strengthens defense against password-cracking techniques together with letter-frequency identification attempts. Static substitution methods differ from the proposed algorithm because it adjusts its encryption pattern in real-time which results in improved key security and randomness. The security evaluation proves that ERSCA effectively defends against cryptanalytic threats thus securing data confidentiality. Studies show that ERSCA achieves better performance results than AES and DES standards by excelling at both encryption speed operations and computational resource management processes and complexity. The experimental data shows that ERSCA reaches 95.5% accuracy which surpasses the original Caesar Cipher (92.3%) and requires less computational resources. The study proves that the ERSCA encryption system represents an effective security tool for applications that need efficient data protection mechanisms under resource-constrained environments.