An Enhanced Cryptosystem based on Shorter Keys and New Security Component

Abstract

Public-key (or asymmetric key) algorithms are the most dominant cryptographic algorithms in the cryptography era. RSA, in particular, is a good example of algorithms that belong to this category which is used for many applications and its security is beyond doubt. The key size of RSA is an important factor that determines its robustness. As the computational powers evolve, the need to increase the security of cryptosystems becomes essential to achieve more robustness against cryptanalysis attacks. In the literature, the commonly used solution to achieve this goal is to increase the key size. However, in practice, keeping increasing the key size is not feasible and not unlimited; increasing the key size demands more computational power. The increase in computational power makes it hard (or impossible) to conduct the encryption process in some environments such as smart cards. Also, it should be taken into consideration that the dramatic increase in computational capabilities of new machines improves their abilities to break encryption keys. Therefore, an alternative to increasing the key size is essentially needed. In this paper, we propose a new approach for encryption that is based on RSA main algorithm while using more encryption keys with smaller sizes in addition to extra security information component (known as the Security Card, SeCa). Our results show that the use of multiple-shorter keys with the SeCa component produces significant improvements in the performance of RSA algorithm in terms of increasing security and reducing the computation overhead by decreasing encryption and decryption times. General TermsSecurity, Algorithms, Encryption.

A Proposed an Enhanced Authentication and Dual Encryption Algorithm: Secured Video Transmission in Surgical Tele-Training

“…The proposed solution is based upon the best current solution (Kumari, 2016) with an enhanced RSA algorithm and a security card to overcome the issues relating to security and performance. A further enhancement was the addition of a biometrics feature in the authentication step and a dual key RSA algorithm with Security Card (2k-RSA) is used to reduce the key size, thus improving encryption speed and overall throughput of the surgical tele-training system (Alslaity and Tran, 2017).…”

“…Dividing the Message (Msg) into two parts and key(E) in Equation 2 (Kumari, 2016) into two parts has the benefit that the key size is reduced. Using a RSA 1024 bit is same as using 2×512-bit (2k-RSA) scheme in terms of processing time and security (Alslaity and Tran, 2017).…”

“…The purpose of this research is to increase the security of video transmissions by reducing the key size of the RSA algorithm while reducing computational cost. Current RSA algorithms require the addition of extra keys for a higher level of security which is here overcome through an enhanced RSA algorithm for video encryption based on 2k-RSA with Security card (Seca) as additional security (Alslaity and Tran, 2017). Furthermore, the introduction of biometrics with a secure One-Time Password (OTP) as mentioned by Yadav (2017) enhances the existing authentication scheme.…”