A Secure Method For Digital Signature Generation for Tamperproof Devices

In the information age the security of information is one of the primary issues and any vulnerability in this regards can have devastating effects. Implementation of cryptographic algorithms to protect identification, authentication or data storage has been the prime focus in cryptographic arena specially for smaller handheld devices. This Project deals with implementation of efficient CRT-RSA algorithm for digital signature generation in smart cards and new scheme to make it secure against Bellcore attacks. Generally smartcards have very limited computational power so RSA-CRT is widely used in order to generate digital signature with a reasonably large key with reasonable speed. but despite being fairly tamperproof ,smartcards are vulnerable to side channel attacks like fault attacks, timing attacks etc. One of the simplest fault attacks is named Bellcore attack, which seriously compromises the security of the system because of it revealing the secret factorization of RSA modulus and nature of fault induced doesn’t matter. This project aims at implementing algorithm using RSA and Chinese remainder theorem which is secure against bellcore attack and alerts in case of fault