Elizebeth Smith Friedman (August 26, 1892 – October 31, 1980) was a cryptanalyst and author, and a pioneer in U.S. cryptography. She has been dubbed "America's first female cryptanalyst". Although she is often referred to as the wife of William F. Friedman, a notable cryptographer credited with numerous contributions to cryptology, she enjoyed many successes in her own right, and it was Elizebeth who first introduced her husband to the field.