Notice of RetractionA threshold key escrow scheme for placing of escrow agent flexibly and identifying cheaters efficiently

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

The thesis proposes a threshold key escrow scheme based on elliptic curve cryptosystem which places the respective importance of escrow agents flexibly on the premise of preventing cheating of key escrow. Firstly, In order to fill up a deficiency that general escrow schemes do not take the respective importance of escrow agents into consideration, the paper proposes a threshold key escrow scheme based on elliptic curve cryptosystem which places the respective importance of escrow agents flexibly. The scheme analyses a condition that key can be recovered by the indispensable participation of one escrow agent. More types of schemes can be designed by the concrete cases of escrow agents. Moreover, stick to the point that how to avoid cheating for key escrow, the paper puts forward the question of KMC´ cheating and its preventing method while it averts the cheating of users, escrow agents and government supervision agency.