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An Illustrated Guide to Cryptographic Hashes

With the recent news of weaknesses in some common security algorithms (MD4, MD5, SHA-0), many are wondering exactly what these things are: They form the underpinning of much of our electronic infrastructure, and in this Guide we'll try to give an overview of what they are and how to understand them in the context of the recent developments. 

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AppArmor

AppArmor is an application security tool designed to provide a highly secure yet easy to use security framework for your applications. AppArmor proactively protects the operating system and applications from external or internal threats, even zero-day attacks, by enforcing good behavior and preventing even unknown application flaws from being exploited. AppArmor security policies, called "profiles", completely define what system resources individual applications can access, and with what privileges. A number of default profiles are included with AppArmor, and using a combination of advanced static analysis and learning-based tools, AppArmor profiles for even very complex applications can be deployed successfully in a matter of hours. 

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Auditing Web Site Authentication

Auditing Web Site Authentication, Part One by Mark Burnett last updated April 24, 2003 Consider this scenario: you build a Web site that requires some kind of user log-in. You allow users to create usernames and passwords and require a valid username and password to get in to your site. But is your Web site authentication scheme secure? Every time I register at a site, I marvel at the consistently laughable - sometimes pathetic - security among even the world's largest Web sites. As the Web becomes more a part of our personal lives, the threat of fraud and identity theft grows accordingly.  

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Case Studies on IT Security

Exploiting And Defending Networks: This presentation talks about taking advantage of an application and gaining "Enterprise Administrative Access" to an internal Windows 2003 network behind a firewall. It uses traditional techniques which are still valid on windows 2003 environment. Exploiting And Defending Web Applications: This presentation talks about taking advantage of improper authentication, authorization, input validation and lost password to gain access to an application and gaining privileged access on a system behind a firewall. Analyzing Code for Security Defects: This presentation talks about a different technique (from Microsoft) in assigning value to risk when performing threat analysis. Once the threat has been determined it talks about how to perform a focused code review on a large code base. It also covers some basic problems that are typically found when performing code review in C/C++. 

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CertainKey Glossaries

Simple descriptions for complicated security terms 

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Common Vulnerabilities and Exposures

Common Vulnerabilities and Exposures (CVE) is: A list of standardized names for vulnerabilities and other information security exposures - CVE aims to standardize the names for all publicly known vulnerabilities and security exposures. A Dictionary, NOT a Database - The goal of CVE is to make it easier to share data across separate vulnerability databases and security tools. While CVE may make it easier to search for information in other databases, CVE should not be considered as a vulnerability database on its own merit. A Community-Wide Effort - The content of CVE is a result of a collaborative effort of the CVE Editorial Board. The Editorial Board includes representatives from numerous security-related organizations such as security tool vendors, academic institutions, and government as well as other prominent security experts. The MITRE Corporation maintains CVE and moderates Editorial Board discussions. 

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Computational complexity theory

Complexity theory is part of the theory of computation dealing with the resources required during computation to solve a given problem. The most common resources are time (how many steps it takes to solve a problem) and space (how much memory it takes). Other resources can also be considered, such as how many parallel processors are needed to solve a problem in parallel. Complexity theory differs from computability theory, which deals with whether a problem can be solved at all, regardless of the resources required. 

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