An efficient and secure identity based multiple signatures scheme based on RSA

Information security is one of the main concerns today. Digital signature plays an important role to ensure authentication, non-integrity and non-repudiation on a message. Digital signature can be computed using RSA, DSA and elliptic curve cryptography. It can be simple signature in which hash of the message is encrypted with the private key of the sender. This private key and corresponding public keys are generated by CA, and public key are bind in the digital certificate. Another approach is Identity Based (ID) signature in which private keys are generated by PKG and public key is derived from the user's identity. This is also known as certificate less communication. In ID based signature, there is no need to transmit public key over unsecure channel. Public keys are efficiently derived from the receiver's identity information such as name, email address, network address, IP address and now aadhar number. Email address can be forged by unauthorized persons. Today aadhar number is used as unique identity proof that can be used as ID to derive public key of the user. In this paper we have used aadhar number to propose an efficient and secure identity based multiple signature schemes using RSA. Proposed scheme is secure against forgery and public key replacement attack.