Biblio

Encryption has become an important need for each and every data transmission. Large amount of delicate data is transferred regularly through different computer networks such as e-banking, email applications and file exchange. Cryptanalysis is study of analyzing the hidden information in the system. The process of cryptanalysis could be done by various features such as power, sound, electromagnetic radiation etc. Lightweight cryptography plays an important role in the IoT devices. It includes various appliances, vehicles, smart sensors and RFID-tags (RFID). PRESENT is one such algorithm, designed for resource constrained devices. This requires less memory and consumes less power. The project propounds a model in which the cryptographic keys are analyzed by the trace of power.

Of late, the massive use of pervasive devices in the electronics field has raised the concerns about security. In embedded applications or IoT domain implementing a full-fledged cryptographic environment using conventional encryption algorithms would not be practical because of the constraints like power dissipation, area and speed. To overcome such barriers the focus is on lightweight cryptography. In this paper a new lightweight PRESENT cipher has been proposed which has modified the original PRESENT cipher by reducing encryption round, modifying the Key Register updating technique and adding a new layer in between S-box layer and P-layer of the existing encryption-decryption process. The key register is updated by encrypting its value by adding delta value function of TEA (Tiny encryption algorithm), which is another lightweight cipher. The addition of extra layer helps us to reduce the PRESENT round from 31 to 25 which is the minimum round required for security. The efficiency of the proposed algorithm is increased by encrypting the key register. The proposed algorithm proves its superiority by analyzing different software parameter analysis like N-gram, Non-Homogeneity, Frequency Distribution graph and Histogram.

Smart Grid is the trend of next generation power distribution and network management that enable a two -- way interactive communication and operation between consumers and suppliers, so as to achieve intelligent resource management and optimization. The wireless mesh network technology is a promising infrastructure solution to support these smart functionalities, while it has some inherent vulnerabilities and cyber-attack risks to be addressed. As Smart Grid is heavily relying on the underlie communication networks, which makes their security and dependability issues critical to the entire smart grid technology. Several studies have been conducted in the field of Smart Grid security, but few works were focused on the dependability and its associated resource analysis of the control center networks. In this paper, we have investigated the dependability modeling and also resource allocation in redundant communication networks by adopting two mathematical approaches, Reliability Block Diagrams (RBD) and Stochastic Petri Nets (SPNs), to analyze the dependability of control center networks in Smart Grid environment. We have applied our proposed modeling approach in an extensive case study to evaluate the availability of smart gird networks with different redundancy mechanisms. A combination of dependability models and reliability importance are used to analyze the network availability according to the most important components. We also show the variation of network availability in accordance with Mean Time to Failure (MTTF) in different network architectures.