An Efficient and Lightweight Deniably Authenticated Encryption Scheme for e-Mail Security

Jayaprakash Kar,Tamer Abdelkader,Kshirasagar Naik

doi:10.1109/access.2019.2960291

Abstract

The most important security requirements to secure electronic mail (e-mail) systems are: confidentiality, authentication, non-repudiation and data integrity. In conventional e-mail systems, Secure/Multipurpose Internet Mail Extensions (S/MIME) and Pretty Good Privacy (PGP) digital envelops are used to satisfy these security requirements. However, confidentiality and authentication are performed in two different phases, which increases computations and leads to more energy consumption. Moreover, the receiver can easily reveal the source of the message, violating the sender's privacy. In this paper, we propose a low-cost deniably authenticated encryption scheme (DA-ENS), where all the cryptographic primitives are being performed in a single logical step to achieve these goals. Experimental results show that our scheme, DA-ENS, achieves low computational cost and communication overhead at 80-bit, 112-bit, 128-bit, 192-bit and 256-bit security levels. Energy consumption is shown to be reduced to 80%, 67%, 42%, 62% and 48% compared to similar schemes SL+BF, LXJ+BF, Fagen Li et al. (FL), AJL and CZJZJSZ respectively. Also, we have proven that, our scheme DA-ENS is provably secure in random oracle model.

Highlights

In the current era of digital information, electronic mail (e-mail) is considered to be a common and widely used medium of communication
We propose our design of a provably secure deniable authenticated encryption scheme deniably authenticated encryption scheme (DA-ENS), where all security goals, confidentiality, non-repudiation, integrity and deniable authentication, can be achieved in a single logical step
We have shown that the proposed scheme Deniable Authentication (DA)-ENS achieves low computational cost, communication overhead and energy consumption

Summary

INTRODUCTION

In the current era of digital information, electronic mail (e-mail) is considered to be a common and widely used medium of communication Whether it is used for personal or general purposes, business or non-business purposes, security is an essential and critical requirement. One of the main drawbacks of traditional e-mail systems is that a recipient, after receiving the intended message, may disclose the source of the message, violating the sender’s privacy. In [9], a deniable authenticated encryption scheme for e-mail systems is proposed.

RELATED WORK

SECURITY NOTION FOR DA-CMA

THE PROPOSED SCHEME

PERFORMANCE ANALYSIS

Findings

VIII. CONCLUSION