# DES Algorithm CSE Seminar Idea for Final Year CSE Students

## Introduction to DES Algorithm CSE Seminar Idea:

The abbreviation for DES is Data Encryption Standard. This is the most widely used encryption algorithm. This DES algorithm is most successful algorithm for encrypting the data by a 220,000\$ machine this DES encrypting algorithm was cracked. Up to that it was used by the government for security purpose. The government is lived on the banking system for years and after that Triple-DES technique was used.

There are various steps involved in the DES encryption algorithm. Since the design of this DES encryption algorithm many encryption algorithms emerged out. This algorithm works on the binary data. The group of numbers makes a base 16 number. The DES algorithm works on basis of 64 bit messages. Which is equal to 16 hex decimal numbers? In this algorithm every 8th key bit is ignored. The effective key size is 56.

How DES Works in Detail:

DES converts the plain text into block of cipher text. It per mutate 2^64 that means 64th power of 2. Each 64 bits is divided into 32 bits a right half block and left half block.

Let M be the plain text message M = 0123456789ABCDEF, where M is in hexadecimal (base 16) format. Rewriting M in binary format, we get the 64-bit block of text:

M = 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
L = 0000 0001 0010 0011 0100 0101 0110 0111
R = 1000 1001 1010 1011 1100 1101 1110 1111

The first bit of M is “0”. The last bit is “1”. We read from left to right.

The keys are stored using 64-bits long. But whenever the sub keys are created the eight bit is created. The mode of encryption mode used is Electronic code book method. The other two modes are cipher feed back.