Xem 1-20 trên 118 kết quả Attack techniques
  • We now begin our look at building protocols using the basic tools that we have discussed. The discussion in this lecture will focus on issues of key establishment and the associated notion of authentication These protocols are not real, but instead are meant to serve just as a high-level survey Later lectures will go into specific protocols and will uncover practical challenges faced when implementing these protocols

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  • One of the most common ways to mount a Distributed Denial of Service attacks is done via networks of zombie computers taking instructions from a central point Early net were controlled via proprietary software written by the network owner Today they are mostly controlled by an IRC channel This makes it easier to control the network and easier for the owner to hide

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  • At cats' green on the Sunday he took the message from the inside of the pillar and added Peter Moran's name to the two names already printed there in the "Brontosaur" code. The message now read: “Leviathan to Dragon: Martin Hillman, Trevor Allan, Peter Moran: observe and tail.” What was the good of it John hardly knew. He felt better, he felt that at last he had made an attack on Peter Moran instead of waiting passively and effecting no retaliation. Besides, what was the use of being in possession of the key to the codes if he never took...

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  • Radio based communication, open air The attacker, having a radio transmitter and receiver with the same radio frequency of the underlying wireless network, can easily: Intercept wireless data Connect his computing devices to a nearby wireless network Inject new packets to an existing wireless network Jam a particular wireless channel using a jamming device Security measures Implement encryption algorithms, authentication algorithms, and integrity-check algorithms at the data-link layer Provide network access with wired equivalent privacy Higher-layer protocols and applications can be used ...

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  • Forge a connection to a host running chargen and have it send useless chargen data to the echo server on another makes the 2 services so busy that the host may crash or be too busy to respond to normal traffic Defense: configure only services that are absolutely necessary (chargen and echo have no business running on a production server)

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  • IP Address Scans scan the range of addresses looking for hosts (ping scan) Port Scans scan promising ports for openness (80, 21, …) Service Evaluation determine the OS Target Selection pick the most vulnerable host, most running services... Vulnerability Probes Automated password attacks FTP, HTTP, NetBIOS, VNC PCAnywhere…. Application specific attacks try known vulnerabilities on present services

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  • After you have mastered the material in this chapter, you will be able to: Compare and contrast computer attack and abuse tactics, explain how social engineering techniques are used to gain physical or logical access to computer resources, describe the different types of malware used to harm computers.

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  • In CERTs 2001 annual report it listed 52,000 security incidents the most serious involving: IP spoofing intruders creating packets with false address then taking advantages of OS exploits eavesdropping and sniffing attackers listen for userids and passwords and then just walk into target systems as a result the IAB included authentication and encryption in the next generation IP (IPv6)

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  • The art of war teaches us to rely not on the likelihood of the enemy's not coming, but on our own readiness to receive him; not on the chance of his not attacking, but rather on the fact that we have made our position unassailable. —The Art of War, Sun Tzu

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  • An open problem in dependency parsing is the accurate and efficient treatment of non-projective structures. We propose to attack this problem using chart-parsing algorithms developed for mildly contextsensitive grammar formalisms. In this paper, we provide two key tools for this approach. First, we show how to reduce nonprojective dependency parsing to parsing with Linear Context-Free Rewriting Systems (LCFRS), by presenting a technique for extracting LCFRS from dependency treebanks.

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  • LAN and Ethernet switches are usually considered as plumbing. They are easy to install and configure, but it is easy to forget about security when things appear to be simple. Multiple vulnerabilities exist in Ethernet switches. Attack tools to exploit them started to appear a couple of years ago (for example, the well-known dsniff package). By using those attack tools, a hacker can defeat the security myth of a switch, which incorrectly states that sniffing and packet interception are impossible with a switch.

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  • Good administrators must know their competition. In this module we will explore some of the different way unauthorized access occurs and the security implications that open certain doors to attack. This is by no means an exhaustive examination and a great administrator must continue to perform reseach to keep apprised of new techniques as they are develpoped.

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  • Exploiting Software is loaded with examples of real attacks, attack patterns, tools, and techniques used by bad guys to break software. If you want to protect your software from attack, you must first learn how real attacks are really carried out.

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  • Intrusion detection is not for the faint at heart. But, if you are a network administrator chances are you're under increasing pressure to ensure that mission-critical systems are safe--in fact impenetrable--from malicious code, buffer overflows, stealth port scans, SMB probes, OS fingerprinting attempts, CGI attacks, and other network intruders.

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  • Defense in Depth is practical strategy for achieving Information Assurance in today’s highly networked environments. It is a “best practices” strategy in that it relies on the intelligent application of techniques and technologies that exist today. The strategy recommends a balance between the protection capability and cost, performance, and operational considerations. This paper provides an overview of the major elements of the strategy and provides links to resources that provide additional insight....

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  • Security-Enhanced Linux (SELinux) is an implementation of mandatory access control using Linux Security Modules (LSM) in the Linux kernel, based on the principle of least privilege. It is not a Linux distribution, but rather a set of modifications that can be applied to Unix-like operating systems, such as Linux and BSD.

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  • Whether a terrorist attack, fibre cut, security breach, natural disaster or traffic overload, today's networks must be designed to withstand adverse conditions and provide continuous service. This comprehensive, leading-edge book reveals the techniques and strategies to help you keep enterprise data and voice networks in service under critical circumstances. You learn numerous ways to minimize single points of failure through redundancy and backups, and discover how to select the right networking technologies to improve survivability and performance....

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  • SIP is a lightweight, transport-independent, text-based protocol. SIP has the following features: Lightweight, in that SIP has only four methods, reducing complexity Transport-independent, because SIP can be used with UDP, TCP, ATM & so on. Text-based, allowing for low overhead SIP is primarily used for VOIP calls

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  • HackNotes Windows Security Portable Reference gives you step-by-step details of intrusion tactics, tools, and actual techniques used by criminals to break into computer networks. Understand how the attacks work, then learn how to access and strengthen your Windows systems through a series of tested and trusted anti-hacking methods, bulletproof best practices, and system-level techniques. Use the unique Reference Center in the middle of the book to access key information, including common port numbers, system commands, reference links, the top security assessment and hacker tools, and more....

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  • Research, experiments and surveys on the flat bed dryer, focus on the cracks rice grains, and compare air reversal mode. The results show that, in both attack-8 scale production dryer and dryer in the laboratory 20 kg, the effects of air is reversed clearly to reduce the difference between the final moisture content, however, its effect on drying time or drying rate is not statistically significant. Mechanical drying, whether with or without reverse air, is superior to dry in the sun cracks down on rice.

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