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INTRODUCTION TO CRYPTOGRAPHYCryptographyThe word cryptography is derived from Greek words kryptos, which means hidden and graphein, meaning to write, this is the process of making and by using codes to secure transmission of the information.EncryptionEncryption is the procedure of converting an original message into a form which is not readable by unauthorized individuals.DecryptionDecryption is process of converting cipher text message back into plaintext.CryptanalysisCryptanalysis is process of obtaining original message from encrypted message without knowing the algorithms and keys used to perform encryption.CryptologyCryptology is science of encryption that combines cryptography and cryptanalysis both
Question: (a) Distinguish between Steganograhy and Cryptography. (b) "Playfair cipher is more secure than Monoalphabetic cipher." Justify this statement. (c) Various ap
GROWTH OF LAN TECHNOLOGY The production of shared communication channels (LANs) started in 1960s and early 1970. The basic idea behind was to reduce the number of connectio
?Examples should include direct costs items, indirect costs items, as well as variable costing. ?What are at least 5 types of expenses that are associated with manufacturing the
CarALouer provides rental of cars to its customer on a regional basis i.e. a car is attached to a regional home-base which also houses a regional office of the company. Each regi
Hypothetical reliable data transfer protocol: A jumping window based Go-back-N ARQ protocol for file transfer using UDP as the transport protocol: In this protocol, a window o
(a) Describe how CSMA/CD operates and explain how Ethernet deals with collisions. (b) Describe how the subsequent protocols work: i. ARP ii. DHCP iii. DNS iv. SMTP (c) The
Problem: (a) What is a firewall and which are its most important tasks? (b) What is the difference between default deny and default permit? Which advantages and disadvanta
Question : (a) There are two approaches for providing confidentiality for packets in a network using symmetric encryption: End-to-End Encryption and Link Encryption. State wh
Size of Option field of an ip datagram is 20 bytes. What is the value of HLEN? What is the value in binary?
Threat Identification After identifying and performing a primary classification of an organization’s information assets, the analysis phase moves onto an examination of threats
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