Integrated approach for fault tolerance and digital signature in RSA

Data security and fault tolerance are two important issues in modern communications. In most cases, they are studied and implemented separately. The author proposes an integrated approach for both fault tolerance and digital signature in the RSA implementation. It shares the same computations required by the hash function, which is the major part of the digital signature and error detections and corrections. Therefore the total overheads are minimised. The proposed approach is able to detect and correct up to three errors occurring in the computation processes, including encryption, decryption and hash function evaluation in the data transmission process. The principle of the proposed approach may also be used for other public key cryptography schemes