Membership includes a subscription to The Cryptogram magazine (6 issues a year) of which each issue has about 100 challenging ciphers of varying difficulty. The Cryptogram includes articles of general and specific interest to hobby cryptanalysts, another devoted to novices, and general news about the ACA. We have a Sample Issue of The Cryptogram that shows several of the cipher types we use (with tutorial solutions available that show how these ciphers can be approached and solved).

In addition, other membership benefits include –

  • an annual directory of ACA members
  • access to the ACA forum
  • submit solutions to the magazine challenges for credit


The current membership costs are listed on the ACA membership form that is referenced on the Become A Member Page.

Ready to become a member?