A Public Key Encryption Scheme with One-Encryption and Multi-Decryption
Pang Liao · Chinese Journal of Computers · 2012
Based on Shamir's threshold secret sharing scheme and the secure symmetric encryption algorithm,a one-encryption and multi-decryption public key encryption scheme is proposed on bilinear pairing on elliptic curve.In the proposed scheme,the message sender has a unique encryption key,while each message recipient has a different decryption key.A message encrypted using the encryption key can be correctly decrypted by any decryption key.Analysis show that the proposed scheme is a secure and efficient one,and at the same time,this scheme has the property of forward secrecy.Even if the master key of the sender is disclosed,the security of the encrypted messages is not affected.This scheme plays an important role in many applications,especially in the secure broadcast/multicast and secure distribution of conference keys.