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.
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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:
