RC4, 전자서명 소스구현

목차

1.RC4
2. 전자서명

본문내용

#include <iostream>
#include <algorithm> //swap();
#include <conio.h> //gets();
using namespace std;
char* RC4(char* P,char* Key, int Size);

void main()
{
char M[20]; //plaintext;
char *KEY = "비밀키입력"; //security key;
char* enc, *dec;
cout << "Input Plaintext((ex)Hong Gil Dong) : ";
gets(M); //Input data;
int len= strlen(M); //size
//encrypt//
enc= RC4(M, KEY, len);
cout << "encrypt : " << enc <<endl;
//decrypt//
dec= RC4(enc, KEY, len);
cout << "decrypt : " << dec <<endl;
}

//*RC4 ALGORITHM*//
char* RC4(char* P,char* Key, int Size)
{
int i,j;
int S[255],T[255];

char* Encrypt= new char[Size];
int Byte_Keylen = strlen(Key);

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