What is Access Control in Network?

The need for network security is a relatively new requirement. Security incidents are rising at an alarming rate every year. As the complexity of the threats increases, so do the security measures required to protect networks. Information Systems are decomposed in three main portions, hardware, software and communications with the purpose to identify and apply information security industry standards, as mechanisms of protection and prevention, at three levels or layers: Physical, personal and organizational. Overview of Access Control Access control is generally a policy or procedure that allows, denies or restricts access to a system. It may, as well, monitor and record all attempts made to access a system. Access Control may also identify users attempting to access a system unauthorized. It is a mechanism which is very much important for protection in computer security. Access control approaches determine how users interact with data and other network resources. Furthermore, access control measures ensure data are protected from unauthorized disclosure or modification. Access control is the traditional center of gravity of computer security. It is where security engineering meets computer science. Its function is to control which principals have access to which resources in the system—which files they can read, which…

What is Cross Site Scripting (XSS or CSS)

Nowadays, with the network expanding quickly, especially Web 2.0 increasing, internet is not anonymous to us anymore. It is a good platform for users to communicate, chat, do business or play game together. For instance, we usually go to Google to search information, Amazon or E-Bay to buy books and many other goods and we also go to My-Space to communicate with friends. Therefore, there is no doubt that Internet is gradually becoming an integral part our daily life. So providing a beneficial and safe networking environment is significantly necessary. If there is vulnerability in a famous website, a lot of visitors will be attacked customers and the result cannot be imagined. XSS is the most common security vulnerability in software today. This should not be the case as XSS is easy to find and easy to fix. XSS vulnerabilities can have consequences such as tampering and sensitive data theft. Overview With the Internet expanding quickly, there are more and more vulnerabilities which threaten billions of customers. Therefore, we must prevent these vulnerabilities from happening in order to provide a safer environment for surfing the Internet. Cross-site Scripting (XSS) refers to client-side code injection attack wherein an attacker can execute…

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