Paper Info
Title
Timed-release encryption with pre-open capability and its application to certified e-mail system
Abstract
We propose timed-release encryption with pre-open capability. In this model, the sender chooses a release time to open the message and a release key to pre-open, and encrypts the message using them. The receiver can decrypt the message only after the release time. When the sender wants the message to be opened before the release time, he may publish the release key. Then, the receiver can decrypt the message from his private key and the release key before the release time. However, an adversary cannot extract any information at any time even with the release key. We formalize the security model and provide an efficient construction secure under the BDH assumption in the random oracle model. In addition, we discuss the application of our schemes to efficient fair exchange systems such as a certified e-mail system.
Year
DOI
Venue
2005
10.1007/11556992_25
Lecture Notes in Computer Science
Keywords
Field
DocType
release key,release time,timed-release encryption,pre-open capability,random oracle model,bdh assumption,security model,certified e-mail system,efficient fair exchange system,private key,efficient construction,encryption,modeling,computer security,oracle,cryptography
Computer security,Computer science,Cryptography,Random oracle,Oracle,Communication source,Encryption,Message broker,Public-key cryptography,Computer security model,Distributed computing
Conference
Volume
ISSN
ISBN
3650
0302-9743
3-540-29001-X
Citations 
PageRank 
References 
27
1.27
15
Authors
3
Name
Order
Citations
PageRank
Yong Ho Hwang124212.36
Dae Hyun Yum231524.95
Pil Joong Lee31039103.09