On the Anonymity of Identity-Based Encryption
Joint Authors
Source
Journal of Applied Mathematics
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-31
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Anonymity of identity-based encryption (IBE) means that given a ciphertext, one cannot distinguish the target identity from a random identity.
In this paper, we thoroughly discuss the anonymity of IBE systems.
We found that the current definition of anonymity is obscure to describe some IBE systems, such as Gentry IBE system.
Furthermore, current definition cannot express the degree of anonymity.
So we divide the degree of anonymity into weak anonymity and strong anonymity based on indistinguishability between different games.
For weakly anonymous IBE systems, the target identity in a ciphertext cannot be distinguished from a random identity.
For strongly anonymous IBE systems, the whole ciphertext cannot be distinguished from a random tuple.
We also discuss the type of anonymity and divide it into two types.
Type 1 means that a random tuple can be seen as a valid ciphertext, while type 2 cannot.
Based on our new definitions, we show that three famous IBE systems, Gentry IBE system, Boyen-Waters IBE system, and Lewko IBE system, have strong but different types of anonymity.
American Psychological Association (APA)
Luo, Song& Hu, Ning. 2013. On the Anonymity of Identity-Based Encryption. Journal of Applied Mathematics،Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-455403
Modern Language Association (MLA)
Luo, Song& Hu, Ning. On the Anonymity of Identity-Based Encryption. Journal of Applied Mathematics No. 2013 (2013), pp.1-9.
https://search.emarefa.net/detail/BIM-455403
American Medical Association (AMA)
Luo, Song& Hu, Ning. On the Anonymity of Identity-Based Encryption. Journal of Applied Mathematics. 2013. Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-455403
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-455403