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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

2025 ACA Convention Information

It’s not too late to sign up for the 2025 ACA Convention, to be held virtually the weekend of August 22-24. We have a strong lineup of speakers on tap for Saturday August 23, so please join us.
Click on the link below to see the tentative schedule and great list of speakers and topics:

Tentative Schedule, Speakers & Topics

Registration information is found under the MEMBERS tab once you log in.


 
 

ACA SWAG

Browse some of the merchandise available in the ACA Swag Shop under the “About” pull down tab or click the link below:

ACA Swag Page