6. Chaos Based Secure Communication Systems

2005 ◽  
pp. 127-149
Author(s):  
Zhengguo Li ◽  
Yengchai Soh ◽  
Changyun Wen
Keyword(s):  
Secure Communication ◽  
Communication Systems

Efficient JPEG Encoding Using Bernoulli Shift Map for Secure Communication

2021 ◽  
Author(s):  
Nisar Ahmad ◽  
Muhammad Usman Younus ◽  
Muhammad Rizwan Anjum ◽  
Gulshan Saleem ◽  
Zaheer Ahmed Gondal ◽  
...  
Keyword(s):  
Secure Communication ◽  
Communication Systems ◽  
Bernoulli Shift ◽  
Random Number Generator ◽  
Lossless Compression ◽  
Jpeg Compression ◽  
Digital Data ◽  
Compression Scheme ◽  
Encrypt Data ◽  
Shift Map

Abstract Digital data must be compressed and encrypted to maintain confidentiality and efficient bandwidth usage. These two parameters are essential for information processing in most communication systems. Image compression and encryption may result in reduced restoration quality and degraded performance. This study attempts to provide a compression and encryption scheme for digital data named as Secure-JPEG. This scheme is built on the JPEG compression format, the most widely used lossy compression scheme. It extends the standard JPEG compression algorithm to encrypt data during compression. Secure-JPEG scheme provides encryption along with the process of compression, and it could be altered easily to provide lossless compression. On the other hand, the lossless compression provides less compression ratio and is suitable only in specific scenarios. The paper address the problem of security lacks due to the use of a simple random number generator which can not be cryptographically secure. The improved security characteristics are provided through Generalized Bernoulli Shift Map, which has a chaotic system with demonstrated security. The algorithm's security is tested by several cryptographic tests and the chaotic system’s behavior is also analyzed.

Security Policies a Formal Environment for a Test Cases Generation

2019 ◽  
pp. 237-264
Author(s):  
Ryma Abassi ◽  
Sihem Guemara El Fatmi
Keyword(s):  
Secure Communication ◽  
Communication Systems ◽  
Security Policy ◽  
System Modeling ◽  
Test Cases ◽  
Model Checker ◽  
Specification Test ◽  
Security Strategy ◽  
Testing Tools ◽  
Test Objective

Specifying a security policy (SP) is a challenging task in the development of secure communication systems since it is the bedrock of any security strategy. Paradoxically, this specification is error prone and can lead to an inadequate SP regarding the security needs. Therefore, it seems necessary to define an environment allowing one to “trust” the implemented SP. A testing task aims verifying whether an implementation is conforming to its specification. Test is generally achieved by generating and executing test cases. Some automated testing tools can be used from which model checkers. In fact, given a system modeling and a test objective, the model checker can generate a counterexample from which test cases can be deduced. The main proposition of this chapter is then a formal environment for SP test cases generation based on a system modeling, a SP specification (test purpose), and the use of a model checker. Once generated, these test cases must be improved in order to quantify their effectiveness to detect SP flaws. This is made through the generation of mutants.

Encryption of Analog and Digital signals through Synchronized Chaotic Systems

2011 ◽  
pp. 415-438
Author(s):  
Kehui Sun
Keyword(s):  
Secure Communication ◽  
Communication Systems ◽  
Chaotic Sequence ◽  
Digital Signals ◽  
Encryption Schemes ◽  
Shift Keying ◽  
Chaos Shift Keying ◽  
Sequence Generator ◽  
Chaotic Secure Communication ◽  
Spreading Spectrum

Chaos is characterized by aperiodic, wideband, random-like, and ergodicity. Chaotic secure communication has become one of the hot topics in nonlinear dynamics since the early 1990s exploiting the technique of chaos synchronization. As distinguished by the type of information being carried, chaos-based communication systems can be categorized into analogy and digital, including four popular techniques such as Chaos Masking, Chaos Shift Keying, Chaos Modulation, and Chaos Spreading Spectrum. In this chapter, the principles of these schemes and their modifications are analyzed by theoretical analysis as well as dynamic simulation. In addition, chaos-based cryptography is a new approach to encrypt information. After analyzing the performances of chaotic sequence and designing an effective chaotic sequence generator, the authors briefly presented the principle of two classes of chaotic encryption schemes, chaotic sequence encryption and chaotic data stream encryption.

Open and Secure Communication - EDI is not enough

2013 ◽  
Author(s):  
Thomas Abdallah ◽  
Ralph Holbein ◽  
Patrick Scheidegger ◽  
Dr. Stephanie Teufel
Keyword(s):  
Information Exchange ◽  
Secure Communication ◽  
Communication Systems ◽  
Production Factor ◽  
Information Industry ◽  
Structured Information ◽  
The Difference ◽  
Information Interchange ◽  
Market Pressures ◽  
Open Office

From the 1994 CAIS Conference:The Information Industry in TransitionMcGill University, Montreal, Quebec. May 25 - 27, 1994.Information is becoming an important production factor. Businesses are being forced to communicate and exchange information with each other because of market pressures such as increased competition, the internationalization of markets, and specialization of production processes. To survive, businesses must streamline both in-house and external communications while at the same time ensuring the quality, timeliness, and availability of information. Information Technology (IT), in the form of open office communication systems, provides a means for supporting this exchange of information. These systems provide a means for hardware- and software-independent communications within the organization as well as communication between organizations. Organizations depend on both the availability of information and the use of IT system. Together called as the electronic information interchange. Since information is primarily represented in the form of documents, open office communication relies on the use of document standards. This paper examines document standards focusing on the difference between loosely and highly structured information exchange and also the role of security which is an important issue for organizations depending on open eletronic information exchange.

Secure communication systems using synchronized Lorenz strange attractor on reconfigurable hardware

2015 ◽  
Author(s):  
Marc M. Sepantaie ◽  
Vy Bui ◽  
Esam El-Araby ◽  
Amir M. Sepantaie ◽  
Georges Nehmatallah ◽  
...  
Keyword(s):  
Strange Attractor ◽  
Secure Communication ◽  
Communication Systems ◽  
Reconfigurable Hardware
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