Explain the encryption model or symmetric cipher model, Computer Network Security

Assignment Help:

With explain the encryption model the help of diagram.

Symmetric cipher model uses the secret-key or a single-key for encryption/decryption purposes. It employs a symmetric encryption, also known as conventional encryption single-key or secret-key encryption.

A few symmetric key algorithms are stated below,

1. Data Encryption Standard also well known as DES

2. Triple DES also known as3DES

3. International Data Encryption Algorithm also known as IDEA

Symmetric cipher model as shown in the figure drawn below consists of five components,

Plaintext is defined as follows:

It refers to the original message which is not encrypted and is in human readable format. It forms the input to an encryption algorithm and output of or the decryption algorithm.

Example of it is

A text document is the executable file or the image.

2.   Encryption Algorithm is defined below:

Application of this algorithm will transform the plaintext to an unreadable, unintelligible form by performing many transformations and substitutions.

 3. Secret-key is defined below:

It is a cost of data which is randomly selected. It acts as an input to the encryption and decryption algorithms both. Thus, the sender and receiver both must share the same key and make sure which is secured, in order to restrict the intruders from reading the messages. The encryption algorithm does the transformations and substitutions on the plaintext consequently, depending on the key.

4. Cipher text is defined below:

It is a scrambled version of the plaintext and is not in a human-readable format. The cipher text produced by encryption algorithm depends on the secret-key and plain text. The encryption algorithm can produce different cipher text for the same plain text by using various secret-keys.

5.   Decryption Algorithm is defined below:

It is a reversed form of the encryption algorithm. It takes the cipher text (that is the encrypted data) as the input and decrypts it, using the same key which was used by the encryption algorithm in order to produce the plaintext (that is original message or data).


Related Discussions:- Explain the encryption model or symmetric cipher model

Explain the term virtual private network, Question: (a) Besides privac...

Question: (a) Besides privacy, what other security functions does Pretty Good Privacy (PGP) provides? (b) What is the Post Office Protocol (POP) used for? Why is it impo

Describe the functionality of a router, QUESTION: (a) Explain, with the...

QUESTION: (a) Explain, with the aid of a diagram, a Star topology of a network of your choice. (b) Illustrate on the use of a MAN and give an example of one. (c) Describe

Types of errors detection in crc , CRC can detect the following errors bett...

CRC can detect the following errors better than check sums. a) Vertical errors b) Burst errors a) VERTICAL ERRORS:  This kind of error happens due to a hardware fai

Reason for multiple topologies, REASON FOR MULTIPLE TOPOLOGIES Every t...

REASON FOR MULTIPLE TOPOLOGIES Every topology has disadvantages and advantages, which are described below: IN A RING:  It is simple to coordinate access to other dev

Computer security, For this assessment, students must research and analyse ...

For this assessment, students must research and analyse two different scenarios. The two scenarios must be chosen from those described below and submitted as one Microsoft PowerPoi

Cost accounting, ?Examples should include direct costs items, indirect cost...

?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

Explain briefly how go-back-n operates, Question: a) There are two basi...

Question: a) There are two basic approaches to dealing with errors in the presence of pipelining. One way is Go-Back-N and the other strategy is Selective Repeat. i. Explain

Sequential label and supply, What questions should Iris ask Charlie about t...

What questions should Iris ask Charlie about the new job, about Kelvin''s team, and about the future of the company?

Extended euclidean algorithm, (a) Using the extended Euclidean algorithm, ...

(a) Using the extended Euclidean algorithm, find the multiplicative inverse of 504 mod 67. (b) Decrypt the following ciphertext, which has been encrypted using Caesar cipher:

Describe how a cellular network works, Problem 1 . Show various features of...

Problem 1 . Show various features of a 1G network Total three features for each feature of 1G Problem 2. Describe how a cellular network works with functional block diagram

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd