Title: On the conventional public key in identification-based encryption: the case of RSA

Authors: Rkia Aouinatou; Mostafa Belkasmi

Addresses: Laboratoire de Recherche Informatique et Telecommunication (LRIT), Faculty of Sciences, Mohamed V-Agdal, B.P. 1014 Rabat, Morocco ' Departement Réseaux et Communication, ENSIAS, Mohammed V-Souissi University, Madinat Al Irfane, B.P. 713, Agdal-Rabat, Morocco

Abstract: This paper relies on the traditional method RSA-OAEP with an identification-based encryption. Firstly, we make a little change in the basic idea (Boneh et al., 2002; Ding and Tsudik, 2003) in order to create a scheme with which we can sign and crypt at same time. A simple comparison prove that our signature is equivalent to the signature of Shamir. Then, we propose a new approach, which conserve properly the RSA classic. In this paper we will also respond to the question of Xuhua Ding and Gene Tsudik, to propose a convenient exponent for an RSA-IBE.

Keywords: PKC; public key encryption; identification-based encryption; IBE; RSA; OAEP; sIDCPA; authentication; Shamir; signature; security; cryptography.

DOI: 10.1504/IJICS.2013.055837

International Journal of Information and Computer Security, 2013 Vol.5 No.3, pp.171 - 201

Published online: 30 Jul 2014 *

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