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

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).

Posted Date: 7/20/2012 6:03:08 AM | Location : United States

Related Discussions:- Explain the encryption model or symmetric cipher model, Assignment Help, Ask Question on Explain the encryption model or symmetric cipher model, Get Answer, Expert's Help, Explain the encryption model or symmetric cipher model Discussions

Write discussion on Explain the encryption model or symmetric cipher model
Your posts are moderated
Related Questions
ADDRESS MASKS To identify receiver, network apply address mask to receiver address and calculate to network address in routing table. It can use Boolean 'and' to calculate the

Spambot Detection: The  previous studies in this field  have focused on content and meta-content based features.  The main assumption in this area of spam detection of late is

What are the main differences between TCP/IP vs OSI?

Question: (a) What is Network Address Translation (NAT)? Why is it used? (b) Given a following information by your ISP about your newly acquired Frame Relay connection:

According to the case, The EZ Company introduced a new technology, focusing on the principles of informationintegration and visualization. The company started negotiatinga saleto a

ADDRESS RESOLUTION PROTOCOL (ARP) TCP/IP can use any of the three address resolution functions relaying on the addressing procedure used by the underlying hardware. To guarant

You have been asked to design a Banking Network with two primary types of locations.  Branches that will have 3 subnets, one /25 subnet one /26 subnet for ABMS and one /26 s

Question: a) What do you meant by Privacy? b) Name the four privacy violations. c) Often, aggregate information and anonymized information can be combined to identif

a) Explain the contents of the Cost Assessment. b) Various Documents are needed for Configuration Management. State three of them, and describe their importance. c) Given tha