Broadcast encryption (BE) allows a sender to broadcast its message to a set of\nreceivers in a single ciphertext. However, in broadcast encryption scheme,\nciphertext length is always related to the size of the receiver set. Thus, how to\nimprove the communication of broadcast encryption is a big issue. In this\npaper, we proposed an identity-based homomorphic broadcast encryption\nscheme which supports an external entity to directly calculate ciphertexts and\nget a new ciphertext which is the corresponding result of the operation on\nplaintexts without decrypting them. The correctness and security proofs of\nour scheme were formally proved. Finally, we implemented our scheme in a\nsimulation environment and the experiment results showed that our scheme\nis efficient for practical applications.
Loading....