Signcryption of proxy re-encryption with publicly verification
Caihui Lan · Journal of Computer Applications · 2013
The existing SignCryption with Proxy Re-Encryption(SCPRE) only provides non-repudiation and its security is weaker than that of the adaptive chosen message attack.Since there are two kinds of signcryption texts,the authors respectively provided two definitions for unforgeability: one was first-level signcryption text's unforgeability produced by the delegator and the other was second-level signcryption text's unforgeability produced by the delegatee.A new signcryption with proxy re-encryption scheme was also proposed,of which the first-level signcryption text and the second-level signcryption text all meet the publicly verifiable requirements,and its security can be proved under random oracle model.And the proposed new scheme is secure and effective.Therefore,this scheme is suitable for high security level requirements of the practical application areas.