Password attack

Ebook Maximum linux security (2nd edition): Part 1 includes contents: Chapter 1 introducing Linux security, chapter 2 physical security, chapter 3 installation issues, chapter 4 basic Linux system administration, chapter 5 password attacks, chapter 6 data attacks, chapter 7 malicious code, chapter 8 sniffers and electronic eavesdropping, chapter 9 scanners, chapter 10 spoofing.

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Phishing attack by illegitimate URLs is of the most common security challenges for both individuals and companies in ensuring the security of their information resources. The user passwords, credit card information, or other sensitive information can be stolen by clicking on the malicious URL links.

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Lecture "Penetration testing: Attack" provide students with knowledge about: Exploitation; Password attack; Client-side exploitation; Social engineering;... Please refer to the detailed content of the lecture!

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Lecture Data communications and computer networks: A business user's approach (8E) - Chapter 12. After reading this chapter, you should be able to: recognize the basic forms of system attacks; recognize the concepts underlying physical protection measures; cite the techniques used to control access to computers and networks; discuss the strengths and weaknesses of passwords;... Please refer to the content of document.

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The contents of this chapter include all of the following: Problem of intrusion, behavior and techniques; intrusion detection (statistical & rule-based); password management; various malicious programs; trapdoor, logic bomb, trojan horse, zombie; viruses; worms; distributed denial of service attacks.

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Chapter 8 - Security and protection. Security and protection measures together ensure that only authorized users can access a file. This chapter discusses different kinds of security and protection threats in an operating system, measures used to thwart these threats, and the role played by the encryption technique in implementing these measures.

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Phishing is a type of Internet procedure to seek to get a victim’s credentials such as passwords, credit card numbers, bank account details and other sensitive information by defrauded webpages. Deceptive webpages have particular features to deflect victims to fall into trap. Comprehensive Phishing Detector (CPhD) system can distinguish phishing websites from legitimate websites by extracting these features from URL pattern, website content, images and animations of webpages.

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Tham khảo sách 'maximum security: a hacker's guide to protecting your internet site and network', công nghệ thông tin, an ninh - bảo mật phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

670p kxjvcm 04-09-2013 154 12   Download

The book isn't focused solely on hacking. Nuwere writes about his mother's battle with drug addiction and her death, his own depression and suicide attempts and life as a street gang member. "In many ways technology saved me. It allowed me to escape from a world of violence and negativity into a world that was limitless and unrestrictive," Nuwere said.

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In recent years, malware has become a widespread prob- lem. Compromised machines on the Internet are generally referred to as bots, and the set of bots controlled by a single entity is called a botnet. Botnet controllers use techniques such as IRC channels and customized peer-to-peer proto- cols to control and operate these bots. Botnets have multiple nefarious uses: mounting DDoS attacks, stealing user passwords and identities, generat- ing click fraud [9], and sending spam email [16].

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Web applications must consider the possibility of mali- cious attackers that craft arbitrary messages, and counter this threat through server-side mechanisms. However, to date, Web application development has focused only on methodologies and tools for server-side security enforcement (for instance, see [11, 13]). At most, non-malicious Web clients have been assumed to enforce a rudimentary “same origin” security policy [22].

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Password sniffing, spoofing, buffer overflows, and denial of service: these are only a few of the attacks on today's computer systems and networks. At the root of this epidemic is poorly written, poorly tested, and insecure code that puts everyone at risk. Clearly, today's developers need help figuring out how to write code that attackers won't be able to exploit. But writing such code is surprisingly difficult.

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Session handling, credit card transactions, and password recovery are just a few examples of Web-enabled business logic processes that malicious hackers have abused to compromise major websites. There are many forms of business logic vulnerabilities commonly exploited by attackers. These vulnerabilities are routinely overlooked during QA because the process is intended to test what a piece of code is supposed to do and not what it can be made to do.

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An on-line auction website prevents attackers from guessing the passwords of users by temporarily locking accounts that receive too many failed attempts (5 tries) in a given amount of time. Once an account is locked, the attacker (or the user) must wait for a timeout to expire (1 hr) before attempting to login again. Account locking is one of several techniques used to slow down brute force attacks. Once logged-in, users are able to browse items being auctioned and view who bid on what. To place a bid, a user is asked for their password to verify their intent, which...

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Protect web content from those who don’t have a “need to know” Require users to authenticate using a userid/password before they are allowed access to certain URLs HTTP/1.1 requires that when a user makes a request for a protected resource the server responds with a authentication request header WWW-Authenticate contains enough pertinent information to carry out a “challenge-response” session between the user and the server

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Repeatedly dial phone numbers looking for a modem to answer or other things War Dialers – used to find modems ToneLoc – 1994 by Minor Threat & Mucho Maas THC-Scan 2.0 – VanHouser, releaces by Hackers Choice thc.inferno.tusclum.edu Win9x, NT, W2000 100 lines/hour TBA – LOpht (www.Lopht.

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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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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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What is Intrusion? E.g. Malice gets Alice’s user name & password and impersonates Alice Intruders are attackers who obtain login information of legitimate users and impersonate them

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You can specify a password, to protect the Outpost Network Security Client settings on client computers from being changed by users. Click the Password tab, select Enable password protection for client firewall settings, and specify the password in the text box provided. Confirm the password and specify whether it should also protect the Outpost Network Security Client service from unauthorized stopping and the Log Viewer from being launched.

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