Learn how to implement a classic substitution cipher in C! This step-by-step tutorial walks you through encoding and decoding messages by replacing each letter with another according to a fixed key. A ...

The Voynich manuscript—a mysterious medieval book that has defied translation for centuries—may have been created using a special code developed with the help of cards and dice, a new study suggests.

Java 26, due in March with structured concurrency, lazy constants, AOT object caching, and primitive types in patterns, instanceof, and switch, has entered a second rampdown phase for bug fixes. Java ...

During the Cold War, numbers stations became prolific as high-security, low-risk spy tools to send secret messages to operatives in the field. However, as early as World War I, espionage agencies were ...