Cryptography

Security of information becomes one of the most important factors of information technology and communication because of the huge rise of the World Wide Web and the copyrights laws. Cryptography was originated as a technique for securing the confidentiality of information. Unfortunately, it is sometimes not enough to keep the contents of a message secret, it may also be necessary to keep the existence of the message secret and the concept responsible for this is called steganography [2]. Steganography

steganography is said to be a covert communication. In contrast to Cryptography, where the enemy is allowed to detect, intercept and modify messages without being able to violate certain security premises guaranteed by a cryptosystem, the goal of Steganography is to hide messages inside other harmless messages in a way that does not allow any enemy to even detect that there is a presence of second message [1]. Both steganography and cryptography are meant for secret communication but the approach is different

Abstract—Steganalysis and steganography are two term used for security purpose for embedding and extracting information in media files in imperceptible way. Steganography is the art of secret communication and steganalysis is the art of detecting the hidden messages embedded in digital media using steganography. Many powerful and robust methods of steganography and steganalysis have been introduced in the literature. In this paper, we will discuss various steganalysis techniques used recently for

I. INTRODUCTION Wireless Sensor Network consists of highly distributed Autonomous sensors nodes to monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants and to cooperatively pass their data through the network to a receiver (destination) [1] [7]. A sensor node consist of a radio transceiver with internal antenna or connected to external antenna, a microcontroller and electronic circuits for interfacing with the sensors and energy source

and logos. The literal meaning of cryptology is “hidden study” or “the study of the hidden.” The science of cryptology is split into two separate sciences, cryptography and cryptanalysis. Cryptography is kryptos and graphein, meaning “hidden writing.” Cryptanalysis is from kryptos and analyein. It means “to loosen or untie the hidden.” Cryptography and cryptanalysis

Introduction Faults occur in every system which may halt the systems functionality. A fault that presents different symptoms to different observers is called a Byzantine fault. These Byzantine faults form the reason for the loss of a system service and are called Byzantine failures. A Byzantine failure may occur due to arbitrary problems like corruption in their local state, production of incorrect outputs or by processing requests incorrectly instead of the general situations like crashing or stopping

Abstract Information security is a major concept in today’s industrial and computer era, so security must be higher to protect the confidential data. Information security plays major role in computer and network security with the use of different cryptography algorithms that includes the encryption and decryption of data with the uses of the algorithm and the key. By means of text or numerical key for the encryption can be dangerous because with the several hack attacks that a key can be broken. So

My plan is to pursue a Master’s Degree in Computer Science with a focus on Computer Security part time at Portland State University starting in January of 2016. My motivation for seeking a masters degree is two-fold: first, after years of self study and independent research and learning, the depth and rigor provided by a graduate level academic program will significantly solidify the skills and knowledge I have gained. Second, the in-depth knowledge that comes from a graduate level program will

Chaotic based Voice Encryption Technique INTRODUCTION Voice encryption system in wireless communication became very important. The advancement of modern wireless telecommunication and multimedia technologies makes a huge amount of sensitivity voice information travel over the open and shared networks. Voice based communication becomes prominent in the application areas of military, voice over IP, e learning, voice-conferencing, telephone banking, telephone services of market securities, etc. These

private decryption key of the receiver. Elliptic Curve cryptography is a method of encryption that involves the algebraic structure of an elliptic curve. An important observation of an elliptic curve that is drawn is that there is some horizontal symmetry. This allows for plotting from one point to another, then bouncing from the second point down to the reflection of the curve to get a value. The advantage with Elliptic Curve cryptography is that there is no backdoor method to cracking the code