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Computer Network Security

How to Protect Your Business From a Cyber Attack
Hackers can be crippling for small businesses who, many times, never recover from the theft. Here are some precautions you can take to help keep your business protected against hackers. More ...

Design a Network Security Policy
A security policy is a statement of what your systems' users are and are not allowed to do. Make sure that the policy is consistent and clearly-written. More ...

Network Security by Filtering
Filtering allows network administrators to control which packets are permitted or denied in or out of a network. It can be used to control how much bandwidth can be used by parts of a network, but is more often used to provide security for a network. More ...

Why Become a CISSP?
As a Certified Information Systems Security Professional (CISSP), you will be seen as a security professional of proven ability who has successfully met a predefined standard of knowledge and experience that is well understood and respected throughout the industry. More ...

Email Security
Email has emerged as one of the most important communication mediums. Failing to secure your organization's mail servers may allow spammers to misuse your servers and bandwidth as an open relay to propagate their spam. More ...

What is a SQL Injection Attack?
SQL injection can be used by an attacker to inject code into a website in order to access and manipulate the database behind the site. More ...

How SSL (Secure Sockets Layer) Works
SSL is a security protocol standard that encrypts communication between a web browser and a web server. Any organization that uses their website to transmit, receive, store, or display confidential or sensitive information such as passwords, credit card or bank account numbers, social security numbers, and so on, needs to use an SSL Connection. More ...

Understanding the Dangers Your Systems Face
It's one thing to know generally that your systems are under fire from hackers around the world and malicious users around the office; it's another to understand specific attacks against your systems. This section discusses some well-known attacks but is by no means a comprehensive listing. More ...

Public Key Infrastructure
PKI (Public Key Infrastructure) uses a public and private key pair obtained and shared through a trusted authority. Public and private keys are used to lock (encrypt) and unlock (decrypt) data. Certificates are the cornerstones of the PKI. More ...

Firewall Perimeter Network (DMZ)
A DMZ (Demilitarized Zone) or Perimeter Network is the area between the firewall that protects the network from untrusted external networks (the Internet) and the firewall that protects the internal network. More ...

Digital Signatures and Certificates
The construction of the Digital Signature entails applying a hash function to the message by concatenation of the message with a known secret key and then applying a mathematical function which will produce a fixed length output known as the digest. More ...

Security Issues with Wireless LANs
Wireless LAN (WLAN) security threats include war dialing, war driving, war chalking, WEP and WPA security cracking, and rogue access points. This artilce discuses approaches to WLAN Security. More ...

What is Cross Site Scripting?
Cross-site scripting attacks are used to steal information from your browser when you visit websites such as ecommerce stores, forums, and even your email accounts. More ...


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