DocumentCode
1538369
Title
Cryptographic key assignment scheme for overcoming the incorrectness of the CHW scheme
Author
Wen, J.-H. ; Sheu, J.-S. ; Chen, T.-S.
Author_Institution
Dept. of Electr. Eng., Nat. Chung Cheng Univ., Chia-Yi, Taiwan
Volume
148
Issue
4
fYear
2001
fDate
8/1/2001 12:00:00 AM
Firstpage
260
Lastpage
264
Abstract
Based on Newton´s interpolation method and a predefined one-way function, a cryptographic key assignment scheme, called the CHW scheme, in a user hierarchy was presented by Chang et al. (1992). The CHW scheme did not need the large amount of storage needed in the Akl-Taylor (1983) scheme. However, two counter-examples have been presented to prove the incorrectness of the CHW scheme, and further two modified versions of the CHW scheme were also proven to be insecure. Owing to these problems, a simple scheme is proposed to overcome the incorrectness and to enhance the security of the CHW scheme
Keywords
Newton method; cryptography; interpolation; CHW scheme; Lagrange polynomial; Newton interpolation method; access control security; cryptographic key assignment; information protection system; key-generation algorithm; modified CHW scheme; one-way function; user hierarchy;
fLanguage
English
Journal_Title
Communications, IEE Proceedings-
Publisher
iet
ISSN
1350-2425
Type
jour
DOI
10.1049/ip-com:20010393
Filename
954639
Link To Document