A Method of Sealed Storage Based on Zero-knowledge Proof

Abstract

By analyzing the existed solutions of sealed storage and combining the definition of the Platform Configuration Register(PCR) by the Trusted Computing Group(TCG),a method for property representation is proposed.This method not only illustrates all the characteristics of a Trusted Computing Platform fully and classifies the Trusted Computing Platform by its property readily,but it also able to make the validation process of the property with the zero-knowledge proof more conveniently.The paper invites a Trusted Third Party(TTP) to define the property of a Trusted Computing Platform and illustrates the principle of the property definition.Aiming at overcoming the inherent defect of Trusted Computing Platform,privacy disclosure,this paper proposes a method of sealed storage based on zero-knowledge proof with Trusted Third Party by introducing zero-knowledge proof into the process of property verifying of the trusted platform.Analysis shows that this method supports remote unseal of the data and avoids the privacy disclosure while maintaining the strengths of existed solutions.It gains stronger security.