ABSTRACT

Identity-based encryption (IBE) is a tool of public-key encryption which is used to overcome the major problem that is getting the receiver’s public-key authentication before the information/message is being assigned to him/her by the sender. Adi Shamir, the Israeli cryptographer and the co-inventor of RSA algorithm, introduced the concept of identity-based cryptography in 1984. Public-key encryption or asymmetrical encryption includes two keys: one is the public key which is known by all, and the other is the private or secret key which is known by the receiver. The Boneh–Boyen IBE scheme is “commutative Blinding” scheme. Using the public parameters of the Boneh–Boyen IBE scheme, the value is calculated by the sender and this value is used to encrypt the plaintext. Hierarchical identity-based encryption was described first by Harwitz and B. Lynn. The most basic primitive in the world of cryptography is the signature.