0
$\begingroup$

The task:

The Playfair cipher with $I = J, X$ added into two same letters and the key keep distance.

The plaintext:

CORONAVIRUS SPREADS FAST

The whitespaces in plaintext and key are to be discarded.

not sure what they mean by I = J, X

The table

enter image description here

I am not quite sure what they are asking for. I know that you usally remove letter J and replace it by I, But now it says * I = J,X" what does he mean by that?

This is what I've written as "coronavirus spreads fast"

CO RO NA VI RU SX SP RE AD SF AS TX

$\endgroup$
2
  • $\begingroup$ Do you know what is a comma and description of the Playfair? $\endgroup$ – kelalaka Mar 7 at 17:42
  • $\begingroup$ Yeah my bad, looks like I just was a bit confused by the sentence how it was written. $\endgroup$ – Papps Mar 7 at 17:54
0
$\begingroup$

It means any instances of double letters in encryption are split up by injecting a letter x (as well as the usual I = J).

In other words read the instructions as

  • I=J
  • X added into two same letters
  • Key KEEP DISTANCE
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.