i need to implement IPSEC on Ad hoc networks as we knew ipsec is a suite protocol which consists ESP and AH header protocol so ESP is implemeted using DES or AES and also i need to simulate on ns2 how? ....etc

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The DES Algorithm Illustrated



Some Preliminary Examples of DES
DES works on bits, or binary numbers--the 0s and 1s common to digital computers. Each group of four bits makes up a hexadecimal, or base 16, number. Binary 0001 is equal to the hexadecimal number 1, binary 1000 is equal to the hexadecimal number 8, 1001 is equal to the hexadecimal number 9, 1010 is equal to the hexadecimal number A, and 1111 is equal to the hexadecimal number F.

How DES Works in Detail
D ....etc

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S-DES Algorithm:-

Encryption:- Encryption algorithm takes an 8-bit block of plaintext and 10-bit key as input and produce an 8-bit block of ciphertext as output.
1. Encryption algorithm involves five functions:
1) an initial permutation function (IP)
2) a complex function (fk) which involves both substitution and permutation
3) a simple permutation function (SW) that switches two halves of data
4) the function f again
5) a permutation function that is the inverse of the initial permutation(IP-1).
2. The function fk takes as input ....etc

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Couplage des m thodes Lattice Boltzmann sur R seau et les El ments Discrets (DEM) pour les simulations des interactions fluide-structure



Contexte de la th se
Les probl mes num riques dus aux distorsions des l ments du maillage sont des obstacles majeurs pour la r solution des probl mes d coulements de fluides surface libre et d interaction fluide structure.
La r solution num rique se fait classiquement avec des m thodes de maillage de types diff rence finis , v ....etc

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Data Hiding in Motion Vectors of Compressed Video
Based on Their Associated Prediction Error ppt ....etc

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http://seminarsprojects.net/Thread-implementation-of-des-algorithm ....etc

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to get information about the topic c code to implement des algorithm full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-implementation-of-des-algorithm

http://seminarsprojects.net/Thread-implement-des-algorithm ....etc

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table des

Person Class
It is represented as a base class that is inherited by other child classes such as Student, Doctor, Employee and other classes. Person class has many properties and methods that help it to achieve its tasks. For example, it contains properties such as name, password, username and email that are considered main data of any person who deals with the site. It contains functions ( methods) such as loginfun, forgetpassword, modifyaccount, Createaccount that are considered as the m ....etc

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hi i want the dis advantages if des algorithm ,please help me ....etc

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Program for DES
#include
#include
void main()
{
int a,b,c,i,j,k,l,m,n,x1;
int p,q,r,s,d,y,e,z=0;
clrscr();
printf(\n Enter the plain Text number:\n);
scanf(%d,&n);
printf(\n Enter the key number \n);
scanf(%d,&k);
printf(\n Enter the bit stream \n);
for(i=0;i {
scanf(%d,&a);
}
p=n\2;
x1=p-k;
for(i=0;i<=x1;i++)
{
c=0;
z++;
}
z=z-1;

printf(\n Enter the Key bit Stream\n);
for(i=0;i {
sca ....etc

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