Strong binding for software key escrow

Research for software based key escrow systems (KES) presents interesting problems. Advantages of software based KES over hardware based systems are openness, user acceptance, examinability, scalability and flexibility. Investigation of systems solely relying on certification procedures, as compared to tamper resistance, is the primary objective of this paper. Arguments against private key escrow systems are presented, followed by the proposal for a new type of escrow system that partially escrows the long term keys and fully escrows session keys