Encryption

[devilman]

I have also found an encryption algoritm
in this page but I have a problem with it
I cant save the encrypted string in a file
The program is this i have modified it a little bit

#include <iostream>
#include <stdio.h>
#include <string.h>
using namespace std;
int main() {
char string[] = "klausveliu";
int x = 0, l = strlen(string);

printf("ORIGINAL (%d BYTES) : %s\n\n", l, string);
if (l < 10){
cout<<"\nPass not very secure!\n";
}
// Encrypt
for (x = 0; x < l; x ++)
string[x] += (256^x) * (x % 256);

printf("\"ENCRYPTED\": %s\n\n", string);

// Decrypt
for (x = 0; x < l; x ++)
string[x] -= (256^x) * (x % 256);

cout<<"Decrypted :"<<string<<endl;
system("pause");
return 0;
}


If someone know how to do this please help
even if you have an another way to do this.

[Gregor]

there should be no problem with saving the string into a file, just make sure your file is opened in binary and than write it... also, you might get strange results when printing the encripted string to the console

[elvenspike]

i've got one thing to say, i know you said you found it but :
it tells you that L < 10 is not very secure, and yet the encryption algorithm is not very secure at all. (256^x) * (x % 256) ... yeah...
maybe you should replace it with a simple RSA algorithm. use a prime number generator to get some high primes for it, then the encrypted password will be using "INDUSTRY-GRADE ENCRYPTION!" unless you put at the top of the source file (if its included) :

/* Note To Self : The Private Key Is ... (-numbers-, -numbers-)...
Post-Note To Self : Delete This From The Source Before Distribution.
Post-Post-Note To Self : Copy The Private Key Out First
Post-Post-Post-Note To Self : Monkeys! */

btw, use code when you post a code, it'll put that around it. looks better.