H. Elkamchouchi¹, Heba G. Mohamed², Fatma Ahmed¹ and Dalia H. ElKamchouchi¹,
¹Alexandria University, Egypt and ²Arab Academy for Science and Technology (AAST), Egypt

Fault tolerance and data security are two important issues in modern communication systems. In this paper, we propose a secure and efficient digital signature scheme with fault tolerance based on the improved RSA system. The proposed scheme for the RSA cryptosystem contains three prime numbers and overcome several attacks possible on RSA. By using the Chinese Reminder Theorem (CRT) the proposed scheme has a speed improvement on the RSA decryption side and it provides high security also.

Digital Signature, Fault tolerance, RSA Cryptosystem, Security Analysis