Design of Mobile Public Key Infrastructure (M-PKI) Using Elliptic Curve Cryptography
Sangram Ray, Biswas G. P · International Journal on Cryptography and Information Security · 2013
Recently the demand of mobile phones and their applications are increasing rapidly and as a result, it becomes essential to design and/or improve the existing PKI (Public Key Infrastructure) useful for mobile phones or devices. Since a mobile phone has small screen, low computing power, small storage capacity etc, the present paper proposes an ECC -based mobile-PKI that overcomes these limitations and supports various mobile-based applications, because the use of ECC significantly reduces the computation cost, message size and transmission overhead over RSA based PKI as160-bit key-size in ECC provides comparable security with 1024 -bit key in RSA. Also the proposed method includes aMobile Home Agent (MHA) per user and a Registration Authority (RA) that further minimize the major work/processing loads of mobile phone and Certificate Authority (CA), respectively. This paper addresses a secure implementation of the proposed M -PKI, whose security analysis against different attacks shows that all attacks are protected.Finally, a comparative study of the M-PKI with the existing PKI is done, which gives satisfactory performance.