A mobile agent clone detection system using general transferable E-cash and its specific implementation with Ferguson's E-coin.

by Lam Tak-Cheung.Thesis (M.Phil.)--Chinese University of Hong Kong, 2002.Includes bibliographical references (leaves 61-66).Abstracts in English and Chinese.Chapter 1. --- Introduction --- p.1Chapter 1.1 --- Evolution of the Mobile Agent Paradigm --- p.2Chapter 1.2 --- Beneficial Aspects of Mobile Agents --- p.3Chapter 1.3 --- Security Threats of Mobile Agents --- p.4Chapter 1.4 --- Organization of the Thesis --- p.6Chapter 2. --- Background of Cryptographic Theories --- p.7Chapter 2.1 --- Introduction --- p.7Chapter 2.2 --- Encryption and Decryption --- p.7Chapter 2.3 --- Six Cryptographic Primitives --- p.8Chapter 2.3.1 --- Symmetric Encryption --- p.8Chapter 2.3.2 --- Asymmetric Encryption --- p.9Chapter 2.3.3 --- Digital Signature --- p.9Chapter 2.3.4 --- Message Digest --- p.10Chapter 2.3.5 --- Digital Certificate --- p.11Chapter 2.3.6 --- Zero-Knowledge Proof --- p.11Chapter 2.4 --- RSA Public Key Cryptosystem --- p.12Chapter 2.5 --- Blind Signature --- p.13Chapter 2.6 --- Secret Sharing --- p.14Chapter 2.7 --- Conclusion Remarks --- p.14Chapter 3. --- Background of Mobile Agent Clones --- p.15Chapter 3.1 --- Introduction --- p.15Chapter 3.2 --- Types of Agent Clones --- p.15Chapter 3.3 --- Mobile Agent Cloning Problems --- p.16Chapter 3.4 --- Baek's Detection Scheme for Mobile Agent Clones --- p.17Chapter 3.4.1 --- The Main Idea --- p.17Chapter 3.4.2 --- Shortcomings of Baek's Scheme --- p.18Chapter 3.5 --- Conclusion Remarks --- p.19Chapter 4. --- Background of E-cash --- p.20Chapter 4.1 --- Introduction --- p.20Chapter 4.2 --- The General E-cash Model --- p.21Chapter 4.3 --- Chaum-Pedersen's General Transferable E-cash --- p.22Chapter 4.4 --- Ferguson's Single-term Off-line E-coins --- p.23Chapter 4.4.1 --- Technical Background of the Secure Tools --- p.24Chapter 4.4.2 --- Protocol Details --- p.27Chapter 4.5 --- Conclusion Remarks --- p.30Chapter 5. --- A Mobile Agent Clone Detection System using General Transferable E-cash --- p.31Chapter 5.1 --- Introduction --- p.31Chapter 5.2 --- Terminologies --- p.33Chapter 5.3 --- Mobile Agent Clone Detection System with Transferable E-cash --- p.34Chapter 5.4 --- Security and Privacy Analysis --- p.37Chapter 5.5 --- Attack Scenarios --- p.39Chapter 5.5.1 --- The Chosen Host Response Attack --- p.39Chapter 5.5.2 --- The Truncation and Substitution Attack --- p.40Chapter 5.6 --- An Alternative Scheme without Itinerary Privacy --- p.41Chapter 5.7 --- Conclusion Remarks --- p.43Chapter 6. --- Specific Implementation of the Mobile Agent Clone Detection System with Transferable Ferguson's E-coin --- p.45Chapter 6.1 --- Introduction --- p.45Chapter 6.2 --- The Clone Detection Environment --- p.46Chapter 6.3 --- Protocols --- p.48Chapter 6.3.2 --- Withdrawing E-tokens --- p.48Chapter 6.3.2 --- The Agent Creation Protocol --- p.51Chapter 6.3.3 --- The Agent Migration Protocol --- p.51Chapter 6.3.4 --- Clone Detection and Culprit Identification --- p.52Chapter 6.4 --- Security and Privacy Analysis --- p.54Chapter 6.5 --- Complexity Analysis --- p.55Chapter 6.5.1 --- Compact Passport --- p.55Chapter 6.5.2 --- Passport growth in size --- p.56Chapter 6.6 --- Conclusion Remarks --- p.56Chapter 7. --- Conclusions --- p.58Appendix 一 Papers derived from this thesis Bibliograph

DNAgents: Genetically Engineered Intelligent Mobile Agents

Mobile agents are a useful paradigm for network coding providing many advantages and disadvantages. Unfortunately, widespread adoption of mobile agents has been hampered by the disadvantages, which could be said to outweigh the advantages. There is a variety of ongoing work to address these issues, and this is discussed. Ultimately, genetic algorithms are selected as the most interesting potential avenue. Genetic algorithms have many potential benefits for mobile agents. The primary benefit is the potential for agents to become even more adaptive to situational changes in the environment and/or emergent security risks. There are secondary benefits such as the natural obfuscation of functions inherent to genetic algorithms. Pitfalls also exist, namely the difficulty of defining a satisfactory fitness function and the variable execution time of mobile agents arising from the fact that it exists on a network. DNAgents 1.0, an original application of genetic algorithms to mobile agents is implemented and discussed, and serves to highlight these difficulties. Modifications of traditional genetic algorithms are also discussed. Ultimately, a combination of genetic algorithms and artificial life is considered to be the most appropriate approach to mobile agents. This allows the consideration of agents to be organisms, and the network to be their environment. Towards this end, a novel framework called DNAgents 2.0 is designed and implemented. This framework allows the continual evolution of agents in a network without having a seperate training and deployment phase. Parameters for this new framework were defined and explored. Lastly, an experiment similar to DNAgents 1.0 is performed for comparative purposes against DNAgents 1.0 and to prove the viability of this new framework

Preemptive mobile code protection using spy agents

This thesis introduces 'spy agents' as a new security paradigm for evaluating trust in remote hosts in mobile code scenarios. In this security paradigm, a spy agent, i.e. a mobile agent which circulates amongst a number of remote hosts, can employ a variety of techniques in order to both appear 'normal' and suggest to a malicious host that it can 'misuse' the agent's data or code without being held accountable. A framework for the operation and deployment of such spy agents is described. Subsequently, a number of aspects of the operation of such agents within this framework are analysed in greater detail. The set of spy agent routes needs to be constructed in a manner that enables hosts to be identified from a set of detectable agent-specific outcomes. The construction of route sets that both reduce the probability of spy agent detection and support identification of the origin of a malicious act is analysed in the context of combinatorial group testing theory. Solutions to the route set design problem are proposed. A number of spy agent application scenarios are introduced and analysed, including: a) the implementation of a mobile code email honeypot system for identifying email privacy infringers, b) the design of sets of agent routes that enable malicious host detection even when hosts collude, and c) the evaluation of the credibility of host classification results in the presence of inconsistent host behaviour. Spy agents can be used in a wide range of applications, and it appears that each application creates challenging new research problems, notably in the design of appropriate agent route sets

Using MapReduce Streaming for Distributed Life Simulation on the Cloud

Distributed software simulations are indispensable in the study of large-scale life models but often require the use of technically complex lower-level distributed computing frameworks, such as MPI. We propose to overcome the complexity challenge by applying the emerging MapReduce (MR) model to distributed life simulations and by running such simulations on the cloud. Technically, we design optimized MR streaming algorithms for discrete and continuous versions of Conway’s life according to a general MR streaming pattern. We chose life because it is simple enough as a testbed for MR’s applicability to a-life simulations and general enough to make our results applicable to various lattice-based a-life models. We implement and empirically evaluate our algorithms’ performance on Amazon’s Elastic MR cloud. Our experiments demonstrate that a single MR optimization technique called strip partitioning can reduce the execution time of continuous life simulations by 64%. To the best of our knowledge, we are the first to propose and evaluate MR streaming algorithms for lattice-based simulations. Our algorithms can serve as prototypes in the development of novel MR simulation algorithms for large-scale lattice-based a-life models.https://digitalcommons.chapman.edu/scs_books/1014/thumbnail.jp

Telemedicine

Telemedicine is a rapidly evolving field as new technologies are implemented for example for the development of wireless sensors, quality data transmission. Using the Internet applications such as counseling, clinical consultation support and home care monitoring and management are more and more realized, which improves access to high level medical care in underserved areas. The 23 chapters of this book present manifold examples of telemedicine treating both theoretical and practical foundations and application scenarios

Summary of Research 1994

The views expressed in this report are those of the authors and do not reflect the official policy or position of the Department of Defense or the U.S. Government.This report contains 359 summaries of research projects which were carried out under funding of the Naval Postgraduate School Research Program. A list of recent publications is also included which consists of conference presentations and publications, books, contributions to books, published journal papers, and technical reports. The research was conducted in the areas of Aeronautics and Astronautics, Computer Science, Electrical and Computer Engineering, Mathematics, Mechanical Engineering, Meteorology, National Security Affairs, Oceanography, Operations Research, Physics, and Systems Management. This also includes research by the Command, Control and Communications (C3) Academic Group, Electronic Warfare Academic Group, Space Systems Academic Group, and the Undersea Warfare Academic Group

Safety and Reliability - Safe Societies in a Changing World

The contributions cover a wide range of methodologies and application areas for safety and reliability that contribute to safe societies in a changing world. These methodologies and applications include: - foundations of risk and reliability assessment and management - mathematical methods in reliability and safety - risk assessment - risk management - system reliability - uncertainty analysis - digitalization and big data - prognostics and system health management - occupational safety - accident and incident modeling - maintenance modeling and applications - simulation for safety and reliability analysis - dynamic risk and barrier management - organizational factors and safety culture - human factors and human reliability - resilience engineering - structural reliability - natural hazards - security - economic analysis in risk managemen