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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

The ACA Convention for 2024 will be held in Phoenix on September 20-22 in Tempe, Arizona.

The hotel is:

Comfort Suites, Phoenix Airport
1625 South 52nd Street
Tempe, Arizona 85281
tel: (480) 446-9500

We have negotiated an inexpensive convention rate. To get that rate, follow this link: ACA 2024 Convention Rate

This will give you a normal looking reservation link, but it notes the “American Cryptogram Association’ and our special rate.

If you call the hotel, there is a special Lyft rate (a flat 15 dollars) that will get you from Phoenix Sky Harbor to the Comfort Suites. If you forget, a cab or an Uber can get you there for about the same price.

Unless you want to extend your trip before or after the convention, rental cars are not needed. Note that fairly inexpensive day rates for car rentals may escalate well above seventy dollars a day when various taxes and fees are added nowadays.

SHMOO (email) is the host and the board contact is PHILLIES (email).

If you have an idea for a presentation, contact PHILLIES.

The Saturday banquet will be catered by Lucille’s Smokehouse BBQ. We’ll choose a subset from this menu: Lucille’s catering menu

Contact SHMOO if you have special dietary requirements (allergies, vegan/vegetarian).

 

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 under the Resources tab. To access it, click HERE.

Tutorials for Sample Issue We now have tutorial solutions for all the ciphers in the free Sample Issue of The Cryptogram. Get your solving effort started with a nudge or follow along to see the complete solution of the cipher. It’s like looking over the shoulder of a friend solving a cipher.

THE RAT has upgraded his Conmaker program by adding the following cipher types in the “More Types” menu: CONDI, Nicodemus, Nihilist Substitution, Numbered Key, Phillips, Route, Sequence. The format of the program is slightly smaller and some minor error corrections and cosmetic changes were made. 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.