Title :
Identity-based ring signcryption schemes: cryptographic primitives for preserving privacy and authenticity in the ubiquitous world
Author :
Huang, Xinyi ; Susilo, Willy ; Mu, Yi ; Zhang, Futai
Author_Institution :
Coll. of Math. & Comput. Sci., Nanjing Normal Univ., China
Abstract :
In this paper, we present a new concept called an identity based ring signcryption scheme (IDRSC,). We argue that this is an important cryptographic primitive that must be used to protect privacy and authenticity of a collection of users who are connected through an ad-hoc network, such as Bluetooth. We also present an efficient IDRSC scheme based on bilinear pairing. As a regular signcryption scheme, our scheme combines the functionality of signature and encryption schemes. However, the idea is to have an identity based system. In our scheme, a user can anonymously sign-crypts a message on behalf of the group. We show that our scheme outperforms a traditional identity based scheme, that is obtained by a standard sign-then-encrypt mechanism, in terms of the length of the ciphertext. We also provide a formal proof of our scheme with the chosen cipher-text security under the decisional bilinear Diffie-Hellman assumption, which is believed to be intractable.
Keywords :
Bluetooth; ad hoc networks; authorisation; cryptography; data privacy; message authentication; telecommunication security; ubiquitous computing; Bluetooth; ad-hoc network; authenticity preservation; bilinear pairing; ciphertext; cryptographic primitives; decisional bilinear Diffie-Hellman assumption; encryption scheme; identity based system; identity-based ring signcryption; privacy preservation; sign-then-encrypt mechanism; signature scheme; Bluetooth; Computer networks; Computer science; Distributed computing; Elliptic curve cryptography; Identity-based encryption; Pervasive computing; Power engineering computing; Privacy; Public key cryptography; Bilinear Pairing; Cryptography; Identity-based; Privacy and Trust; Ring Signcryption;
Conference_Titel :
Advanced Information Networking and Applications, 2005. AINA 2005. 19th International Conference on
Print_ISBN :
0-7695-2249-1
DOI :
10.1109/AINA.2005.205