SIGABA was a complex cipher machine used by the United States during World War II for secure communications. It was designed to encrypt and decrypt messages, ensuring that sensitive information remained confidential. The machine utilized a series of rotating gears and electrical circuits to create a highly secure code that was difficult for enemy forces to break. Developed by Bell Labs, SIGABA was considered one of the most advanced cipher machines of its time. Its design allowed for a high level of security, making it a vital tool for military operations. The machine played a crucial role in maintaining the secrecy of communications between military leaders and units.