Efficient ID-based Proxy Chameleon Signature from Bilinear Pairings

This paper introduces a new digital signature primitive that allows a proxy signer to sign messages on behalf of the original signer, in a way that do not allow the recipient of the signature to disclose the contents of the signed information to any third party without the proxy signer´s consent. The above primitive, called proxy chameleon signature enjoys all the attributes in the normal proxy signature and chameleon signature, and it is also proved secure against existential forgery under adaptive chosen message attack in the random oracle model assuming Weak-DH problem is hard