**Elonka Dunin (@ElonkaDunin) (elonka.com)** is an experienced crypto expert, co-founder and co-leader of a group of cryptographers who are working hard to crack the final cipher on the famous Kryptos sculpture at CIA Headquarters. She maintains a list of the world’s most famous unsolved codes on her elonka.com site, and has written multiple books, including *The Mammoth Book of Secret Codes and Cryptograms*. Bestselling author Dan Brown named one of the characters in his *Da Vinci Code* sequel, *The Lost Symbol*, after her. (“Nola Kaye” is an anagrammed form of “Elonka.”) She is a member of the board of directors for the National Cryptologic Foundation, and is a lifetime member of the International Game Developers Association. With co-author Klaus Schmeh, she recently published the book *Codebreaking: A Practical Guide*, as well as an article in the academic journal *Cryptologia* on hill climbing techniques, entitled, “How We Set New World Records in Breaking Playfair Ciphertexts.” In 2021, she gave the TEDx talk, “2,000 Years of Ordinary Secrets.”