This dissertation provides methods to utilize chaos efficiently in secure communications. Chaos has many desirable characteristics such as ergodicity and sensitivity to initial conditions, and is considered an ideal candidate for use in cryptography and secure communications. On the other hand, it suffers from sensitivity to noise and fading if it is used for physical layer transmission, and errors due to the finite precision of the numerical algorithms in digital systems. This limits the use of chaos in cryptographic applications. Accordingly, this dissertation proposes new algorithms to enhance the security of modern communication systems using chaos. The focus is on developing chaotic cryptosystems for wireless systems that are reliable, secure, and have good performance. / Graduate / mharoun@uvic.ca

International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, California / Future U.S. Navy at-sea and littoral battle group training range instrumentation requires a new, secure, high data rate link This link must be capable of providing the ranges with the capacity to increase the number of players, increase the amount of threat simulation, and allow an improved Global Positioning System (GPS) based position tracking system to be implemented This paper describes a Dual Function Transponder (DFT) capable of operating on any R-CUBED (Relay, Reporter, Responder) based range as well as any TACTS/ACMI range without modification of either range type. In addition, the DFT provides a new increased data rate capability for use by planned future ranges, enabling a dramatic increase in the number of participants as well as significantly increasing the quantity of data that can be communicated by each player. Miniaturization and programmability are the keys to this development and many of the methods used are described.

ITC/USA 2013 Conference Proceedings / The Forty-Ninth Annual International Telemetering Conference and Technical Exhibition / October 21-24, 2013 / Bally's Hotel & Convention Center, Las Vegas, NV / This paper describes some of the security challenges faced by Wireless Sensor Networks (WSN). A classification and analysis of prominent attacks on the routing protocols of WSN is provided, along with a review of recent developments in the field to help mitigate the impact of these attacks.

Every business and household rely on internet in this day and age. We are using electronic devices connected to the Internet. These devices are generating a considerable amount of data, which is usually transmitted using public/insecure communication channels. On the one hand, the technological advancement of universal connectivity brought so much ease for humans’ race in business, shopping, and financial transactions. The rapid pace of this technological advancement also introduced several concerns in terms of the security and secrecy of data. Security researchers developed several encryption algorithms that are in use to ensure the safety and confidentiality of data. The mathematical difficulty of prime factorisation is the fundamental element of modern encryption algorithms, and they require a considerable amount of processing power to reverse engineer (or break) these algorithms. Scientists and government agencies are trying to build quantum computers to solve some complex problems. These problems include prime factorisation of large numbers, a critical factor in the field of cryptography. Quantum computers are much more potent because of their nature. It processes information by using laws of quantum. The successful development of quantum computers will pit the security and secrecy of our data at risk because it is trivial for the quantum computer to break the currently used encryption algorithms. Bearing this in mind, Research have started working on systems that will provide secure communications in the age of quantum computing. Considering the importance of quantum physics-based communication systems, we have some working examples of these systems, which are called quantum key distribution systems (QKD). These system uses quantum physics to transmit quantum states from one party to another. In case of the presence of Eavesdropping, the whole system will be disturbed, letting both parties know the existence of eve. QKD systems have some success and have different protocols, but until now, they have a very long way to go. When these systems are mature enough, they will require to work with current internet infrastructure, which is very costly and brings so much complexity to the network that it will not be feasible to implement. This thesis proposes a Multiple Access QKD Network integrated with Internet infrastructure to addresses these issues of Secure Communication. The system proposed in this thesis takes existing protocols of data communication, QKD, along with hardware architecture of communication devices. A QKD based client and network switch have been designed and developed along with its operating system to enable multi-access communication in the LAN environment. A simulation model of the model proposed in this thesis has been by using OMNet++ simulation framework to test and evaluate the viability of this model. The proposed QKD mechanism will reduce the complexity for network administrators, reduce the cost of implementation for businesses, and ensure the secrecy and security of the data even in the age of quantum computing.

Yes / This article presents a novel four-dimensional autonomous fractional-order chaotic system (FOCS) with multi-nonlinearity terms. Several dynamics, such as the chaotic attractors, equilibrium points, fractal dimension, Lyapunov exponent, and bifurcation diagrams of this new FOCS, are studied analytically and numerically. Adaptive control laws are derived based on Lyapunov theory to achieve chaos synchronization between two identical new FOCSs with an uncertain parameter. For these two identical FOCSs, one represents the master and the other is the slave. The uncertain parameter in the slave side was estimated corresponding to the equivalent master parameter. Next, this FOCS and its synchronization were realized by a feasible electronic circuit and tested using Multisim software. In addition, a microcontroller (Arduino Due) was used to implement the sug-gested system and the developed synchronization technique to demonstrate its digital applicability in real-world applications. Furthermore, based on the developed synchronization mechanism, a secure communication scheme was constructed. Finally, the security analysis metric tests were investigated through histograms and spectrograms analysis to confirm the security strength of the employed communication system. Numerical simulations demonstrate the validity and possibility of using this new FOCS in high-level security communication systems. Furthermore, the secure communication system is highly resistant to pirate attacks. A good agreement between simulation and experimental results is obtained, showing that the new FOCS can be used in real-world applications.

<p>With the advent of powerful multimedia capable mobile phones, the market for mobile services is flourishing. Zenterio AB's Halfpipe Active Desktop is a complete distributed mobile service platform a with a powerful server and platform-independent client. The communication between the client and server takes place over a GPRS-capable mobile network. </p><p>The purpose of this thesis is to develop a secure communications protocol for use between the Halfpipe Active Desktop client and server. This is done by determining requirements, analyzing candidate protocols and then by designing the final protocol. The result, the Halfpipe Active Channel protocol, is an authorized, encrypted, session oriented, message based and light weight protocol designed to minimize computational as well as network overhead.</p><p>This master's thesis project was defined by and performed at Zenterio AB during the second half of 2004.</p>

With the advent of powerful multimedia capable mobile phones, the market for mobile services is flourishing. Zenterio AB's Halfpipe Active Desktop is a complete distributed mobile service platform a with a powerful server and platform-independent client. The communication between the client and server takes place over a GPRS-capable mobile network. The purpose of this thesis is to develop a secure communications protocol for use between the Halfpipe Active Desktop client and server. This is done by determining requirements, analyzing candidate protocols and then by designing the final protocol. The result, the Halfpipe Active Channel protocol, is an authorized, encrypted, session oriented, message based and light weight protocol designed to minimize computational as well as network overhead. This master's thesis project was defined by and performed at Zenterio AB during the second half of 2004.

Computer Aided Design (CAD) applications have historically been based on a single user per application architecture. Although this architecture is still popular to date, it does have several drawbacks. First of all the single user CAD architecture inhibits a concurrent engineering design process where several designers can work on the same model simultaneously. This limitation introduces time inefficiency especially when a project involves geographically dispersed designers. A solution to these drawbacks could be a transition from the traditional single user CAD architecture to a multiuser collaborative architecture. Advances in computer networking technologies, especially relating to the Internet, have provided the needed tools to make this transition a reality, thus making it possible for designers to simultaneously work on geometric models from one or more networked computers regardless of the location of the user. This new paradigm is expected to improve collaboration and greatly reduce product design times and consequently reduce cost and improve productivity. The multi-user architecture will, however, also require reliable security mechanisms to ensure its successful deployment in an enterprise environment where protection of intellectual property is of critical importance. This thesis proposes a framework to implement authentication, authorization and secure data communications in a multiuser collaborative CAD software system. This framework has been tested on an emerging multiuser collaborative CAD system called v-CAx being developed at Brigham Young University.

Picture Archiving and Communication Systems (PACS) have been traditionally constrained to the premises of the healthcare provider. This has limited the availability of these systems in many parts of the world and mandated major costs in infrastructure for those who employ them. Public cloud services could be a solution that eases the cost of ownership and provides greater flexibility for PACS implementations. This could make it possible to bring medical imaging services to places where it was previously unavailable and reduce the costs associated with these services for those who utilize them. Moving these systems to public cloud infrastructure requires that an authentication and encryption policy for communications is established within the PACS environment to mitigate the risks incurred by using the Internet for the communication of medical data. This thesis proposes a framework which can be used to create an authenticated and encrypted channel to secure the communications with a cloud-based PACS. This framework uses the Transport Layer Security (TLS) protocol and X.509 certificates to create a secured channel. An enterprise style PKI is used to provide a trust model to authorize endpoints to access the system. The validity of this framework was tested by creating a prototype cloud-based PACS with secured communications. Using this framework will provide a system based on trusted industry standards which will protect the confidentiality and integrity of medical data in transit when using a cloud-based PACS service.

Emergency response is highly time-critical and information dependent: every moment counts and organizations need to access various information that supports their decision making and informs them about the scale and location of the emergency, the damages, and the availability of human and physical resources. This kind information can originate from many different places and the situation can be stressful as there is a need to communicate quickly, reliably and accurately within their own organization, but also inter-organizationally. ICTs make it possible to access and spread information with speed and efficiency, but other factors, such as different professional cultures, can still hinder information sharing. There is a growing need in emergency organizations to develop understanding for how communications between emergency responders can be secured. It seems important to consider how emergency responders respond to security objectives, since the assumptions for secure communications may not only be developed on the premise of ICT, but also how the emergency actors appreciate the emergency environments in terms of secure communications.The aim of this research is to develop understanding of information security and secure communications in a context where it has not been well researched. The research looks at secure emergency communications from a socio-technical viewpoint and concentrates on the communication inside and between the emergency organizations of police, the paramedics, and the rescue department in the municipality of Kemi, and more specifically on the communications of operative emergency actors while they are working in the preparedness and response phases of emergency management. Two persons from each organization were interviewed using semi-structured interviews, and the empirical data was used for writing the appended papers that are the basis of this thesis work.The research started by doing an extensive literature review and analysis on the field of secure emergency communications. The results show that while technical developments on the field aim at effective and secure technologies, organizational aspects of emergency communications seem to involve not only emergency actors, but also how these actors more and more utilize information technology. The landscape for emergency management is becoming very diverse, which challenges the way that secure emergency communications can be understood. The developers of future emergency communications structures not only need to ensure the technical aspects of confidentiality, availability and integrity of information, but they also need to take into account the social rules, norms and structures that guide the emergency communication. Next, this research sought out to re-conceptualize the role of information security in emergency response. A conceptual basis encompassing technical, cognitive and organizational information security layers as a relationship between association and connectivity was developed by synthesizing Actor Network Theory and Theory of Organizational Routines. The approach of combining two theoretical accounts details the enactment of information security in emergency response so as to understand how cognition ties technical security features with organizational security issues. Without the cognitive layer, the technical and organizational aspects of information security remain static or disconnected to the actions performed during emergency response. Theoretically the approach contributes constructively to describe an alternative approach to information security research to address the gap between formal and informal criteria of information security.Lastly, the research sought out to explore the current situation of the case organizations in detail concerning their level of information security, communication challenges faced, and training offered. It was learned that different aspects of information security are valued depending on whether emergency responders work in preparation periods or if they are responding to an emergency: 1) When working in their own respective organizations the most important aspect was information confidentiality 2) When responding to emergency the most important aspects were information availability and integrity. Most communication challenges present in emergency communications can be seen to arise when responding to emergencies. This is not something currently being taken into account in the case organizations. The basic training of emergency actors and the training and guidelines of each organization largely concentrate on confidentiality issues, and tools and communications training that would be needed to ensure information availability and integrity when responding to an emergency is not prioritized. To overcome the communication challenges present in emergency communications and to ensure confidentiality, availability and integrity of emergency information, those responsible for information security in emergency organizations must therefore provide up to date information security training and awareness building, but also tools and communications training that supports inter-organizational communication.