SIGSALY Cipher: The Top-Secret Encryption System of WWII

Exploring the History, Functionality, and Legacy of SIGSALY Cipher | Karthikeyan Nagaraj

During World War II, the US military developed a top-secret encryption system called SIGSALY, which was used to secure communications between high-ranking military officials.

The SIGSALY system was highly sophisticated and was designed to be unbreakable by enemy codebreakers.

This article aims to provide a comprehensive guide to the SIGSALY cipher, including its history, functionality, and legacy.

History of SIGSALY Cipher:

• SIGSALY was developed by Bell Labs in the US during World War II, in response to the need for secure communication between military officials.
• The system was first deployed in 1943 and was used throughout the war to secure high-level communications between the US and its allies.
• The existence of the SIGSALY system was highly classified, and its use was only disclosed to a select few military officials.

Functionality of SIGSALY Cipher:

• The SIGSALY system used a highly advanced encryption technique called speech inversion, which involved encoding…