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The Confinement Problem

Digital Signatures

Information flow policies

Common Threats

Example Information Flow Controls

What is Exploitation

Trojans and Backdoors

Packet Sniffing: Sniffing Tools Detection Prevention Methods

Access Control Lists ACL

Requirements for a Security Consultant

The Principles of Secure Computing Design

Fenton`s Data Mark Machine

Academic Computer Security Policy

Data is an asset. Generally data is stored in electronic format on any electronic media. It occupies very less space so we can store large amount of data on any media. Generally in now a days peoples are using Pen drive or Compact Disk to store or transfer from one location to another location. Moreover sometimes peoples are using portable hard drives also. Main characteristic of data stored in electronic format is it can be copied or modified or deleted within friction of a second. Due to this reason we must have to secure our data to stop misuse by an unauthorized person. Data Security means protecting the data from unauthorized access, use, disclosure, modification or destruction.

There are main three aspects of data security.

1. Confidentiality : It means your data is confidential and it is available to you only as

and when required.

2. Integrity : It means that data cannot be modified without authorization.

3. Availability : It means for any person or system to serve its purpose, the

information must be available when it is needed.

There are some threats and vulnerabilities from where our important data can be stolen. Mainly the data can be stolen from our computer system or laptop. Moreover the data can be stolen from any kind of local area network n or wireless network. Sometimes a serious virus attack can also damage our important data. Now a days more and more peoples are using internet to fulfil their day to day requirement like pay bills using credit cards, book railway or air tickets online, share market transaction or any kind of fund transfer. The person must have to be very careful while making such kind of transactions otherwise their confidential data like credit card details or password of net banking can be stolen and can be used for misused.

To avoid these kinds of problems we must have to put various kinds of controls to make our transaction more secured. Administrative control, User based control or Network security becomes more important. With the help of new technology we can improve the security at various levels. Moreover security audit can also be helpful to find out vulnerabilities and threats. So, at last get aware and protect our important data or get ready to loose our secret or confidential data.