1. Write short answers for each one of them a) Method of concealing data includi
ID: 3878762 • Letter: 1
Question
1. Write short answers for each one of them a) Method of concealing data including messages, files, keys and passwords is known as: b) Method to protect blocks of data from being altered is known as c) What are three parts of CIA triad? d) What is the main difference between accountability and availability e) What is the ITU-T recommended security architecture for OSI called? 2. Explain the differences between active and passive attacks. Give suitable examples. 3. What are the four categories of active attack? Write short notes for each of them. 4. Consider an automated teller machine (ATM) in which users provide a personal identification number (PIN) and a card for account access. Give examples of confidentiality, integrity, and availability requirements associated with the system and, in each case, indicate the degree of importance of the requirement. 5. Make a sketch of model for network security and show how cryptography plays an important role in it.Explanation / Answer
a)Method of concealing data including messages, files, keys and passwords is known as
Ans: Symmetric encryption
Usually in criptography Symmetric encryption method is used to concealing data including messages, files, keys and passwords
b)Method to protect blocks of data from being alters is known as:
Ans:Asymmetric encryption
c)Three parts of CIA triad are confidentiality, integrity, and availability.And this model is mainly designed to guide policies for information security.
confidentiality is nothing but maintaining privacy.
Integrity is the process of maintaining the consistency, accuracy, and trustworthiness of data.
Availability inlcudes maintaining requirements available immediately.
d) Accountabile means that not only being responsible but also being answerable for actions.While availability is inlcudes maintaining requirements available immediately. Accountable includes explanation owed but availability not.
e)The ITU-T recommended security architecture for OSI is - X.800
2) There are mainly two types of attcaks in nature. They are:
Passive Attack: Passive type of attacks mainly attempts to make use of information from some other system. Passive attacks does not affect system or data
Active Attack: Active type of attacks mainly attempts to alter system resources or data.
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