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The American Cryptogram Association
The American Cryptogram Association (ACA) is a non-profit organization dedicated to promoting the hobby and art of cryptanalysis -- that is, learning to break ciphers.
News

PayPal If you wish to use PayPal for paying your ACA dues or ACA For Sale items, please refer to the instructions on the membership page.Free Web App. The ACA’s “Solve a Cipher!” program is now available as a free web app for users of Google’s Chrome web browser. To get it, click HERE, or go to the Chrome Web Store and search on “ciphers”.

New Expanded Free Sample Issue The free sample issue of The Cryptogram available for download has been expanded with more explanations and many more ciphers to solve. Read about it and download it on the Sample Issue page under About the ACA.

THE RAT has made available for ACA members a program called Conmaker. It is designed for Windows users to easily create and submit cons to the ACA column editors. If interested, go to the Members Area / Downloads and get your copy.