...Security Issues in Mobile Computing Srikanth Pullela Department of Computer Science University of Texas at Arlington E-mail: pvssrikath@hotmail.com Abstract In the present mobile communication environment, lot of research is going on, to improve the performance of issues like handoffs, routing etc. Security is another key issue that needs to be considered, which comes into picture once the communication channel is setup. Many security protocols are being proposed for different applications like Wireless Application Protocol, 802.11 etc. most of them are based on the public and private key cryptography. This paper provides an insight on these cryptographic protocols and also looks into the current research project going on at Sun Microsystems Lab on wireless security. 1.Introduction With the rapid growth in the wireless mobile communication technology, small devices like PDAs, laptops are able to communicate with the fixed wired network while in motion. Because of its flexibility and provision of providing ubiquitous infrastructure, the need to provide security increases to a great degree. As wireless communication takes place mainly through the radio signals rather than wires, it is easier to intercept or eavesdrop on the communication channels. Therefore, it is important to provide security from all these threats. There are different kinds of issues within security like confidentiality, integrity, availability, legitimacy, and accountability that needs...
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...285_NSS_01.qxd 8/10/04 10:40 AM Page 1 Chapter 1 Vulnerability Assessment Solutions in this Chapter: I What Is a Vulnerability Assessment? I Automated Assessments I Two Approaches I Realistic Expectations Summary Solutions Fast Track Frequently Asked Questions 1 285_NSS_01.qxd 2 8/10/04 10:40 AM Page 2 Chapter 1 • Vulnerability Assessment Introduction In the war zone that is the modern Internet, manually reviewing each networked system for security flaws is no longer feasible. Operating systems, applications, and network protocols have grown so complex over the last decade that it takes a dedicated security administrator to keep even a relatively small network shielded from attack. Each technical advance brings wave after wave of security holes. A new protocol might result in dozens of actual implementations, each of which could contain exploitable programming errors. Logic errors, vendor-installed backdoors, and default configurations plague everything from modern operating systems to the simplest print server.Yesterday’s viruses seem positively tame compared to the highly optimized Internet worms that continuously assault every system attached to the global Internet. To combat these attacks, a network administrator needs the appropriate tools and knowledge to identify vulnerable systems and resolve their security problems before they can be exploited. One of the most powerful tools available today...
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...1 – Introduction to Computer Concepts History of Computer * Often referred to the different generations of computing devices. * The circuitry is smaller and more advanced than previous generation. * First Generation - 1940-1956: Vacuum Tubes * Often enormous, very expensive, use a great deal of electricity and generate a lot of heat. * E.g., UNIVAC, ENIAC * Second Generation - 1956-1963: Transistors * Computers are smaller, faster, cheaper, more energy-efficient and more reliable. * Third Generation - 1964-1971: Integrated Circuits * Miniaturized Transistors were placed on silicon chips called semiconductors. * Increased speed and efficiency. * Fourth Generation - 1971-Present: Microprocessors * Thousands of Integrated Circuits (IC) were onto a silicon chip. * Computers are more powerful and linked to networks. * Fifth Generation - Present and Beyond: Artificial Intelligence * Uses parallel processing, quantum computation and nano-technology. * Respond to natural language input and capable of learning and self-organization. Computer Literacy * Knowledge and understanding of computers and their uses. Computer * An electronic device that transform input into output. Information Processing Cycle * Is a series of Input, Process, Output and Storage. Components of a Computer * Input, Process, Output, Storage and Communication Computer Systems * It has data inputs, processes that transform data...
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...in a way that gives the research process unheard-of possibilities. The current level of technological development allows for the construction of objects that are smaller, more intelligent and embedded in the environment and even wearable. These objects, which record and learn our habits are connected to the Internet and they have computing capabilities. They can also be interconnected and generate large quantities of information to benefit the environment in which they are located as well as the travellers that possess them. This gives rise to a new world of interconnected personal machines. This new world involves a convergence among what is physical, what is social and what is digital. Within this context, research assumes the principal role to guide evolution, transferring knowledge to the industry. Relevant academic research is more necessary than ever before in order to explore how ICT in tourism can...
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...Table of Contents Chapter 1 Evaluating the Cisco ASA VPN Subsystem .......................................3 Chapter 2 Deploying Cisco ASA IPsec VPN Solutions ............................. 42 Chapter 3 Deploying Cisco ASA AnyConnect Remote-Access SSL VPN Solutions..............................109 Chapter 4 Deploying Clientless RemoteAccess SSL VPN Solutions ................148 Chapter 5 Deploying Advanced Cisco ASA VPN Solutions .............................184 CCNP Security VPN 642-648 Quick Reference Cristian Matei ciscopress.com [2] CCNP Security VPN 642-648 Quick Reference About the Author Cristian Matei, CCIE No. 23684, is a senior security consultant for Datanet Systems, Cisco Gold Partner in Romania. He has designed, implemented, and maintained multiple large enterprise networks, covering the Cisco security, routing, switching, service provider, and wireless portfolios of products. Cristian started this journey back in 2005 with Microsoft technology and finished the MCSE Security and MCSE Messaging tracks. He then joined Datanet Systems, where he quickly obtained his Security and Routing & Switching CCIE, among other certifications and specializations, such as CCNP, CCSP, and CCDP. Cristian has been a Cisco Certified Systems Instructor (CCSI) since 2007, teaching CCNA, CCNP, and CCSP curriculum courses. In 2009, he received a Cisco Trusted Technical Advisor (TTA) award and became certified as a Cisco IronPort Certified Security Professional (CICSP) on E-mail...
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