1 research outputs found
Anonymous Identity-Based Encryption with Identity Recovery
Anonymous Identity-Based Encryption can protect privacy of the receiver.
However, there are some situations that we need to recover the identity of the
receiver, for example a dispute occurs or the privacy mechanism is abused. In
this paper, we propose a new concept, referred to as Anonymous Identity-Based
Encryption with Identity Recovery(AIBEIR), which is an anonymous IBE with
identity recovery property. There is a party called the Identity Recovery
Manager(IRM) who has a secret key to recover the identity from the ciphertext
in our scheme. We construct it with an anonymous IBE and a special IBE which we
call it testable IBE. In order to ensure the semantic security in the case
where the identity recovery manager is an adversary, we define a stronger
semantic security model in which the adversary is given the secret key of the
identity recovery manager. To our knowledge, we propose the first AIBEIR scheme
and prove the security in our defined model.Comment: 18 pages, ACISP 201