Revisiting the Security Model for Timed-Release Encryption with Pre-open Capability

Abstract. The concept of timed-released encryption with pre-open capability (TRE-PC) was introduced by Hwang, Yum and Lee. In a TREPC scheme, a message is encrypted in such a way that it can only be decrypted at a certain point in time or if the sender releases a piece of trapdoor information known as a pre-open key. This paper examines the security model for a TRE-PC scheme, demonstrates that a TRE-PC scheme can be constructed using a KEM–DEM approach, and provides an efficient example of a TRE-PC scheme.

• Type: Conference
• Year: 2007
• Where: ISW
• Authors: Alexander W. Dent, Qiang Tang
• Keywords: ISW 2007, Timed-released Encryption, TRE-PC Scheme, TREPC Scheme