BT0088, Cryptography and Network Security

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ASSIGNMENT

DRIVE	fall 2017
PROGRAM	BSc IT
SEMESTER	FIFTH
SUBJECT CODE & NAME	BT0088, Cryptography and Network Security
BK ID	B2069
CREDITS	4
MARKS	60

Q.1. What is the need for security? 10

Answer:-

Need for security:-

Any part of a computing system can be the target of a crime. When you refer to a computing system, it means a collection of hardware, software, storage media, data, and people that an organization uses to perform computing tasks. Sometimes, you can see that parts of a computing system are not valuable to an outsider, but

Q.2.What do you understand by cryptography?                                                                               10

Answer:-

The word cryptography comes from the Greek words kryptos meaning hidden and graphein meaning writing. So cryptography is the study of hidden writing, or is the science of encrypting and decrypting text. A fundamental rule in cryptography is that one must assume that the cryptanalyst knows the methods used for

Q.3.What are intruders? (Explain in details). 10

Answer:-

Computer security means keeping your computer safe from virus and hacking of information from your computer while you are online. For effective computer security, one should take care of physical security measures to ensure that hardware and media are not stolen or damaged, to minimise the risk and

Q.4. Write short note on Digital signature. 4+6

Answer:-

Digital signature:-

A digital signature is a protocol that produces the same effect as a real signature: It is a mark that only the sender can make, but other people can easily recognize as belonging to the sender. Just like a real signature, a

Q.5. Write short notes on DES. 10

Answer:-

Data Encryption Standard (DES):-

The most widely used encryption scheme is based on Data Encryption standard. Data Encryption Standard (DES), a system developed for the U.S. government, was intended for use by the general public. It has been officially accepted as a cryptographic standard both in the United States and abroad. Moreover,

Q.6. Give an overview of IP security. 10

Answer:-

Overview of IP security:-

IPSec provides connectionless, best-effort delivery of datagrams through a network by protecting it from snooping or modification. IPSec protects IP datagrams by defining a method of specifying the traffic to protect, how that traffic is to be protected, and to whom the traffic is sent. IPSec can protect

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