Kevin Yap documents his journey in creating ‘ultra,’ an Enigma-cracking program in Rust. He reflects on the history of the Enigma machines, their role in WWII, and the cryptanalysis efforts at Bletchley Park that inspired his project. Yap demonstrates ultra’s capabilities through examples, highlighting the use of statistical methods for decryption distinct from historical approaches. He further discusses Rust’s advantageous features, such as memory safety and ease of parallel computing, which he leveraged throughout his project. This exploration concludes with insights into Rust’s growing popularity and potential in the industry, fueled by his positive experience working with the language.