[Ethereal]

This is my own ROT13 class. It is fast - it did 10,000 characters instantly(1/5 of a second) and I am pretty proud of it.

Some constructive criticism is Ok, but don't flame.

Code

class ROT13
{
    /// <summary>
    /// This is an implementation of the ROT13(Rotation of 13, a.k.a Caesar Shift) algorithm, coded by Ethereal of HackForums.net.
    /// This will scramble your string into an unreadable form.
    /// </summary>
    public string AlterText(string input)
    {
  char[] text = input.ToCharArray();
  for (int i = 0; i < input.Length; i++)
  {
    int value = (int)text[i];
    if (value >= 'a' && value <= 'm' || value >= 'A' && value <= 'M')
    {
    value += 13;
    }
    else if (value >= 'm' && value <= 'z' || value >= 'M' && value <= 'Z')
    {
    value -= 13;
    }

    text[i] = Convert.ToChar(value);
  }
  string FinVal = new string(text);
  return FinVal;
    }
}

I hope that it is useful to you.

Update* Vigenere and ROT_X class to come soon. One more bug fix for Vigenere.

[Blue Screen of Death]

why don't you make a ROT-X class? not just a ROT-13 ...
Anyway i like it.
Thanks

[haphap]

you don't have to get the int value of the char... you just do char > 'a' etc it auto converts

[Ethereal]

why don't you make a ROT-X class? not just a ROT-13 ...
Anyway i like it.
Thanks

I will be updating it to such a class. I was trying to keep it simple for my first implementation.

you don't have to get the int value of the char... you just do char > 'a' etc it auto converts

Thank you for that. This is the kind of info that I am looking for!

[BravoTwoZero]

Very nice... will try and test it but first I need to learn C# [:(]

[Ethereal]

Very nice... will try and test it but first I need to learn C# [:(]

I would definetly recommend it.

I may translate this to VB, when I finish a ROT - X class.

[BravoTwoZero]

I would definetly recommend it.

I may translate this to VB, when I finish a ROT - X class.

Ok thankyou , looking forward to next three months which I havw the GSCE's coming up then will start learning C sharp... Thank god!!

[Mr. Anderson]

Ha nice! Glad people are starting to port encryption to .net.

[AssChin79]

Nice Caeser Cipher! How 'bout a Vigenere cipher next! That one's my favorite for obscuring symmetric keys!

[Ethereal]

Nice Caeser Cipher! How 'bout a Vigenere cipher next! That one's my favorite for obscuring symmetric keys!

I've been working on one.

It's all working fine, no errors, except when I decrypt, it changes the encrypted 'z' into an 'a'.

Breakpoints time.

[Zer0Fact0r]

Look into this: http://msdn.microsoft.com/en-US/library/...S.80).aspx

Also this is not a proper Caesar cipher. A Caesar cipher with a shift of 1 will translate a 'z' to a 'a'.

[Ethereal]

Look into this: http://msdn.microsoft.com/en-US/library/...S.80).aspx

Also this is not a proper Caesar cipher. A Caesar cipher with a shift of 1 will translate a 'z' to a 'a'.

This is a Caesar Cipher of 13. Trust me, I know what I am talking about.

This is ROT13, not generic Caesar Cipher.

Also, I have since updated the class with the '||' operator, so I will update it soon.