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Purpose -The purpose of this research is to incorporate the exponentiated Weibull testing-effort functions into software reliability modeling and to estimate the optimal software release time. Design/methodology/approach -This paper suggests a software reliability growth model based on the non-homogeneous Poisson process (NHPP) which incorporates the exponentiated Weibull (EW) testing-efforts. Findings -Experimental results on actual data from three software projects are compared with other existing models which reveal that the proposed software reliability growth model with EW testing-effort is wider and effective SRGM. Research limitations/implications -This paper presents a SRGM using a constant error detection rate per unit testing-effort. Practical implications -Software reliability growth model is one of the fundamental techniques to assess software reliability quantitatively. The results obtained in this paper will be useful during the software testing process. Originality/value -The present scheme has a flexible structure and may cover many of the earlier results on software reliability growth modeling. In general, this paper also provides a framework in which many software reliability growth models can be described.

In this paper a new protocol using fuzzy logic control has been proposed. The protocol is based on Stable Election Protocol (SEP). Fuzzy logic control based on three variables, distance of nodes form base station, density of nodes and the battery level of nodes along with the traditional threshold values used in SEP are used to enhance the process of cluster head election in the existing SEP protocol and improve the lifetime and throughput of the Wireless Sensor Network. The result of the simulation which has been done in MATLAB simulator indicates that Stable Election Protocol based on fuzzy logic is more energy efficient and improves the lifetime and throughput of the network by 73.2 and 68.54 % respectively comparing with the existing SEP protocol.

Stream Ciphers are one of the most important cryptographic techniques for data security due to its efficiency in terms of resources and speed. This study aims to provide a comprehensive survey that summarizes the existing cryptanalysis techniques for stream ciphers. It will also facilitate the security analysis of the existing stream ciphers and provide an opportunity to understand the requirements for developing a secure and efficient stream cipher design.

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