import java.math.BigInteger;
import java.util.Random;
import java.io.*;

public class RSA {

private BigInteger p;
private BigInteger q;
private BigInteger N;
private BigInteger phi;
private BigInteger e;
private BigInteger d;
private int bitlength = 1024;
private int blocksize = 256; //blocksize in byte

private Random r;
public RSA() {
r = new Random();
p = BigInteger.probablePrime(bitlength, r);
q = BigInteger.probablePrime(bitlength, r);
N = p.multiply(q);

phi = p.subtract(BigInteger.ONE) ....etc

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Encryption and decryption are fundamental requirements of every secure-aware application, therefore the Java platform provides strong support for encryption and decryption through its Java Cryptographic Extension (JCE) framework which implements the standard cryptographic algorithms such as AES, DES, DESede and RSA. This tutorial shows you how to basically encrypt and decrypt files using the Advanced Encryption Standard (AES) algorithm. AES is a symmetric-key algorithm that uses the same key for both encryption and decryption of data.

package ....etc

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i want code for encryption and decryption of files using rsa algorithm in java..plz help me
[email protected] ....etc

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can someone please help me with my final year project. i have to encrypt the linear programming problem and then solve the encrypted linear programming problem and after that i have to decrypt the result.
can someone tell me how to encrypt linear problem ....etc

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package com.java.blowfish;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.c ....etc

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hello sir i need to get the source code for RSA for plain text and decryp the same in plain text

can i make use of RSA double encryption/decryption for the same? ....etc

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#include
#include
#include
void main()
{
double p,q,n,m,e,k,z,d1,c1,c2,y;
double d,l,x,c,d2;
clrscr();
printf(The P,Q Primary values:);
scanf(%lf%lf,&p,&q);
n=p*q;
printf(N value is %lf,n);
k=(p-1)*(q-1);
printf(\n K(n) value is:%lf,k);
printf(\n Enter the Integer which is relative to the prime to the K(n));
scanf(%lf,&e);
d2=pow(e,-1);
d=fmod(d2,k);
printf(%lf,&d);
printf(\n Enter the plain text number );
scanf(%lf,&m);
d1=pow(m,e);
c=fm ....etc

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RSA

The RSA cryptosystem is a public-key cryptosystem that offers both encryption and digital signatures (authentication). Ronald Rivest, Adi Shamir, and Leonard Adleman developed the RSA system in 1977 .RSA stands for the first letter in each of its inventors' last names.

The RSA algorithm works as follows: take two large primes, p and q, and compute their product n = pq; n is called the modulus. Choose a number, e, less than n and relatively prime to (p-1)(q-1), which means e and (p-1)(q-1) have no common factors except 1. Find another numb ....etc

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Vodacom Group Limited (Vodacom) is an African mobile communications company, providing voice, messaging, data and converged services to over 55 million customers. From its roots in South Africa, Vodacom has grown its operations to include networks in Tanzania, the Democratic Republic of Congo, Mozambique, and Lesotho and provides business services to customers in over 40 African countries such as Nigeria, Zambia, Angola, Kenya, Ghana, C te d'Ivoire, and Cameroon. It was owned on a 50:50 basis by the South African telecommunications group Telko ....etc

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To get full information or details of encryption and decryption in java using rsa source code of image please have a look on the pages

http://seminarsprojects.net/Thread-a-novel-method-of-encryption-using-modified-rsa-algorithm-and-chinese-remainder-theor?pid=33540#pid33540

http://seminarsprojects.net/Thread-encryption-decryption-full-report?pid=13632

if you again feel trouble on encryption and decryption in java using rsa source code of image please reply in that page and ask specific fields in encryption and decryption in java using rsa ....etc

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