The document discusses data security and provides an overview of key concepts including security measures, policies, principles, and technologies and threats related to data security. It covers topics such as the definition of security and data, how computers are used to store important data, sensitive information, and the threats to security including natural disasters, human errors, hackers, and more. Security services like secrecy, integrity, availability, and access control are explained. The presentation also discusses security policies and models.

1. Data Security Presenter Muhammad Ghazanfar Ullah Head, Computer Systems Engineering. Usman Institute of Technology

3. Security

4. Security For some, it is just a concept; its about peace of mind and reassurance. It's about knowing that there is something you can rely on, something that you can turn to when there is a problem. Having a feeling of security brings you a sense of confidence and security for the future. For others, security means protection against something or someone. It provides a defence for people and property; safeguarding a precious investment or something that is cherished.

5. Data

6. Data While carrying out an investigation about 'ourselves', a child writes 'brown' under the heading 'hair color', this is data about that child. This data becomes information when it is used to inform in some way, for example, when the data is combined with the heading and presented as a statement - 'Jane has brown hair'. Data can take many forms. It might be numerical data of room temperatures, words relating to a particular subject such as flowers, or sounds or images collected to illustrate a presentation. It could even be imaginary data created by children, about characters in their drama, for example.

7. Computers and Data

10. Computers and Data 2002 2003 2004 North America 212.6 222.8 234.4 Latin America 25.6 32.6 43.7 Europe 163.5 195.5 224.8 Africa/ME 9.2 10.7 11.5 Asia/Pacific 151.2 203.6 238.1 Total 562.3 665.4 752.6 Computer Users

11. Computers and Data

13. Computers and Data Sensitive Information Sensitive information is any information stored on your computer that you would hate to have fall into the wrong hands. This could be personal information, employee information, trade secrets, etc. It is the ramifications that are the concern.

15. Data Security

16. Data Security There are two problems with keeping this information on computers. The first problem is information can be lost through technical or human error. The second problem is that some information is confidential - only certain people should see it. These people can be described as ‘authorized users’ and the people who shouldn’t see this information as ‘unauthorized users’.

21. Security of Data Data Confidentiality Data Integrity Data Availability Secure Data Data

25. The Threats to Security

30. The Attacks

32. Types of Attacks

36. The Technology

37. A Security Model Firewalls and Security Gateways are based on this model

38. Encryption

45. Security Policies

50. Policy Thoughts Policy Standards Guidelines Rules Philosophy of protection Goals of protection Task to Accomplish Goal To implement Tasks in Firewalls/IDS Level 1 Level 2 Level 3 Level 4

51. Thankyou!