Hanumat Sastry

Akashdeep Bhardwaj, GVB Subrahmanyam, Vinay Avasthi et al.

In symmetric key cryptography the sender as well as the receiver possess a common key. Asymmetric key cryptography involves generation of two distinct keys which are used for encryption and decryption correspondingly. The sender converts the original message to cipher text using the public key while the receiver can decipher this using his private key. This is also called Public Key Cryptography. For every public key there can exist only one private key that can decipher the encrypted text. Security of RSA Algorithm can be compromised using mathematical attack, by guessing the factors of a large number. It may also be compromised if one can guess the private key. In accordance with the mathematical attack, we propose a secure algorithm in this paper. In this algorithm, we try to eliminate the distribution of n which is the large number whose factors if found compromises the RSA algorithm. We also present a comparative analysis of the proposed algorithm with the RSA algorithm.

Akashdeep Bhardwaj, G. V. B. Subrahmanyam, Vinay Avasthi et al.

Connecting the wired and wireless networks particularly the Mobile ad hoc Network is interesting in real world situations due to its usefulness and practicality. Different mechanisms have been proposed to integrate MANETs and the Internet. These strategies differ in gateway discovery mechanism, cell switching criteria, ad hoc routing protocol.In this paper, Mobile-IP is integrated with Hierarchical Cluster-Head Gateway Switch Routing (CGSR) Protocol to provide Internet access to the mobile node of the ad hoc Network. This paper discusses a mechanism for selecting an alternate route in case if the Cluster Head is unable to forward the packets to the destination. The proposed framework provides bi-directional connectivity between the MANET and the Internet nodes. A detailed performance comparison is made between the proposed approach and the other three-tier strategies based on mobility of cluster heads and cluster gateways and other network parameters. The experimental results indicate that the proposed architecture has better packet delivery ratio, end-end delay and mobile node-gateway connectivity ratio for providing full bi-directional connectivity.

Akashdeep Bhardwaj, G. V. B. Subrahmanyam, Vinay Avasthi et al.

This article attempts to discover the surreptitious features of ransomware and to address it in information systems security research. It intends to elicit attention with regard to ransomware, a newly emerged cyber threat using such encryption technology as RSA, and to help both academic researchers and IT practitioners understand the technological characteristics of ransomware, along with its severity analysis. As ransomware infections continue to rise and attacks employing refined algorithm become increasingly sophisticated, data protection faces serious challenges. The article discusses future trends and research directions related to ransomware, and provides prevention strategies for SMEs.