Can you translate it back?

math2001 profile image Mathieu PATUREL Originally published at math2001.github.io ・1 min read

I've got a little challenge for you.

ib jb eikybfi eite hvim

Can you translate this encrypted text back to its original form?

If you do, send me an email at math2001.contact@protonmail.com explaining how you found it, and I'll add you to the glorious list of people who found the solution :smile: (see below).


I guarantee you the original message:

  • contains only lower case ASCII letters (abcdefghijklmnopqrstuvwxyz)
  • has the same spaces as in the encrypted message. So you know that the first word will have 2 letters, the second one as well, the third one 7, etc...
  • can only translated to one string (the one I gave you)

They found it!

The glorious and amazing people who had a crack and found the secret message!

The list is over here.


Hey hey. Smart one, looking at the right place, :smile:

I'll be posting the original message, as well as an explanation about how it worked on my blog next week, that is the Friday 1 June 2018.

Posted on May 26 '18 by:

math2001 profile



Don't have much inspiration for an original bio right now...


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Are we assuming a bijective mapping? I would assume not.


Na, we aren't assuming a bijective mapping (I had to google that one :laugh:).


In the case of a bijective mapping, every letter is always translated to the same letter. In this case, it isn't (but there's still a logic though).