Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.tcs.2011.06.015
Title: Certificateless cryptography with KGC trust level 3
Authors: Yang, G. 
Tan, C.H. 
Keywords: Certificateless cryptography
Digital signature
Public key encryption
Trust hierarchy
Issue Date: 9-Sep-2011
Citation: Yang, G., Tan, C.H. (2011-09-09). Certificateless cryptography with KGC trust level 3. Theoretical Computer Science 412 (39) : 5446-5457. ScholarBank@NUS Repository. https://doi.org/10.1016/j.tcs.2011.06.015
Abstract: A normal certificateless cryptosystem can only achieve KGC trust level 2 according to the trust hierarchy defined by Girault. Although in the seminal paper introducing certificateless cryptography, Al-Riyami and Paterson introduced a binding technique to lift the KGC trust level of their certificateless schemes to level 3, many subsequent work on certificateless cryptography just focused on the constructions of normal certificateless schemes, and a formal study on the general applicability of the binding technique to these existing schemes is still missing. In this paper, to address the KGC trust level issue, we introduce the notion of Key Dependent Certificateless Cryptography (KD-CLC). Compared with conventional certificateless cryptography, KD-CLC can achieve stronger security, and more importantly, KGC trust level 3. We then study generic techniques for transforming conventional CLC to KD-CLC. We start with the binding technique by Al-Riyami and Paterson, and show that there are some technical difficulties in proving that the binding technique is generally applicable. However, we show that a slightly modified version of the binding technique indeed can be proved to work under the random oracle assumption. Finally, we show how to perform the transformation using a standard cryptographic primitive instead of a random oracle. © 2011 Elsevier B.V. All rights reserved.
Source Title: Theoretical Computer Science
URI: http://scholarbank.nus.edu.sg/handle/10635/111339
ISSN: 03043975
DOI: 10.1016/j.tcs.2011.06.015
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

7
checked on Jan 25, 2021

WEB OF SCIENCETM
Citations

6
checked on Jan 25, 2021

Page view(s)

74
checked on Jan 17, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.