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Re: Using Java To Impleme

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  To: comp.lang.java.gui
Soul Tech wrote:
> Hi I'm looking for SOME advice on how to simulate the following:
> 
> http://i71.photobucket.com/albums/i140/carpinate/RSA.jpg
> http://i71.photobucket.com/albums/i140/carpinate/RSA2.jpg
> 
> Ive done this so far:
> 
> package RSAalgorithm;
> 
> public class SecurityAlgorithm {
> 
>      public static char[] StartSymbolic =

I'd name that variable "letters" or "symbols" rather than "StartSymbolic".

> {'A','B','C','D','E','F','G','H','I','J',
>  
> 'K','L','M','N','O','P','Q','R','S','T',
>                                     'U','V','W','X','Y','Z'};
> 
>      public static int[] numeric =
> {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
>                           16,17,18,19,20,21,22,23,24,25,26};
> 

Since numeric[n] is always n there is no need for this array.

> 
> 
> 
>      public static void main(String[] args) {
> 
> 
>           long P3 = 0;
>           long P3mod33=0;
>           long C7=0;
>            long C7mod33=0;

There is a convention that variable names should start with a lowercase 
letter. Please use those conventions when sharing code. Otherwise your 
variable names look like class names and are confusing.

> 
> 
> 
>        for(int counter = 0; counter < numeric.length; counter++){
> 
>             for(int i = 0; i < StartSymbolic.length; i++)  {

If you are attempting to reproduce the "RSA2" table I don't see why you 
have two for loops, One should suffice. It would be clearer if you used 
variable names like p instead of counter or i.

> 
>               int temp = numeric[counter];

Isn't this the same as
		int temp = counter;

>               P3 = (long) (temp*temp*temp);

Which makes this
                 P3 = (long) (counter*counter*counter);

And if you used my suggestions for naming it would be
                 p3 = p*p*p;
which I would find clearer.
You don't need the the explicit cast to long.

>          P3mod33 = P3%33;
>          C7 = (long)
> (P3mod33*P3mod33*P3mod33*P3mod33*P3mod33*P3mod33*P3mod33);
>         int tp = numeric[counter];

           int tp = counter;


>                  C7mod33 = C7%33;
>        }
> 

The indentation could be improved! Try configuring your editor or IDE to 
replace tabs with spaces (two or four)

>  
> System.out.println("*******************************************");
>                      //System.out.println(StartSymbolic[i]);

Is it the line above that is causing you difficulty? What happens when 
you include it?

>                     System.out.println("Numeric: " +
> numeric[counter]);
>                          System.out.println("P3: " +P3);
>                      System.out.println("P3mod33: " + P3mod33);
>                       System.out.println("C7: " +C7);
>                       System.out.println("C7mod33:" + C7mod33);
>                     //  System.out.println(StartSymbolic[i]);

Shouldn't that be
    System.out.println(StartSymbolic[C7mod33]);


>  
> System.out.println("*******************************************");
> 
>           }
> 
>      }
>  }
> 
> 
> 
> 
> Output:
> *******************************************
> Numeric: 1
> P3: 1
> P3mod33: 1
> C7: 1
> C7mod33:1
> *******************************************
> *******************************************
> Numeric: 2
> P3: 8
> P3mod33: 8
> C7: 2097152
> C7mod33:2
> *******************************************

<snip>

> *******************************************
> Numeric: 26
> P3: 17576
> P3mod33: 20
> C7: 1280000000
> C7mod33:26
> *******************************************
> 
> I was looking to achieve what is shown in the 1st image.
> 
> I can get the numeric, P3, P3mod33, C7, C7mod33 to print out but not
> the symbolic information for some reason?
> 
> I want to be able to allow the user to enter in a string then the
> plaintext and ciphertext can be displayed.
> 
> Like this: 
> String input: SUZANNE
> Output:
> Plaintext:    S    U   Z    A   N   N    E
> Ciphertext: 28   21  20   1   5   5    26
> 

That isn't RSA. That is seven separate RSA-like messages. That would be 
using RSA to produce a trivial substitution cipher.

Followup set to comp.lang.java.help since the problems are not with the GUI.

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