2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/96921For a recent student conference, the authors developed a day-long design problem and competition suitable for engineering, mathematics and science undergraduates. The competition included a cryptography problem, for which a workshop was run during the conference. This paper describes the competition, focusing on the cryptography problem and the workshop. Notes from the workshop and code for the computer programs are made available via the Internet. The results of a personal self-evaluation (PSE) are described.11 pages, 3 figures, uses amsrefs.sty v2.0 and cryptologiabib.sty (included); to appear in CryptologiaCryptography and SecurityComputational Engineering, Finance, and Sciencetext