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Latest Updates:


12/27/10
  • Fixed a bug on the feedback submission page.

1/17/10
  • Corrected 7 errors in the ciphertext due to the low resolution scan I was using as a source. Many thanks to the users who pointed out this very important issue!

9/8/09
  • Fixed some Chrome and IE8 compatibility issues.
  • Minor performance improvements.

9/7/09
  • Added feedback and bug reporting page.
  • Updated page title as a link to home page.

5/13/09
  • Set up google ads.
  • Fixed some Opera compatibility issues.

5/10/09
  • Updated login panel close icon.
  • Fixed a tiny bug with the password change link hover effect.
  • Login validator now clears when a password change is canceled.
  • Fixed some resolution compatibility issues.
  • Fixed some Safari and Chrome compatibility issues.

5/9/09
  • Fixed some IE compatibilty issues.
  • Welcome e-mail is now sent to new users.
  • Corrected some issues with password boxes not clearing.

5/8/09
  • Improved password hashing.
  • Key now saves when enter is pressed in the name field.
  • Added forgotten password remedy.
  • Set up admin notifications.
  • Added password change functionality.

5/7/09
  • Several back-end security improvements.
  • Added second password box for registrations.

5/6/09
  • Implemented reCAPTCHA to reduce spam accounts.
  • Updated behavior so the cipher now resets on signout.
  • On successful key save, validator now displays 'Success'.

5/5/09
  • Rebuilt the login/register gui.
  • Key save validator now resets when the cipher is cleared.
  • Included some basic instructions.
  • Hid the key section.
  • Updated layout.
The purpose of this tool is to aid in solving the Zodiac Killer's 340 cipher. Simply click on any of the cipher characters to enter the plaintext letter you would like to substitute. The app will substitute all other occurences for you. If you create an account, you can save your progress and load it later. Just give your key a unique name and pull up all your saved keys using the menu at the top.

Hopefully, with enough creative brains tackling this cipher, we can finally crack it!

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