FBI Files on Cryptography – FBI File #80-HQ-612

FBI File #80-HQ-612 is a declassified document that provides insight into the evolution of cryptography from its early focus on message confidentiality to more advanced techniques that include message integrity checking, sender/receiver authentication, and digital signatures. The file traces its origins to the mid-20th century and highlights the growing complexity of cryptographic methods used in secure communications. The release includes documents from multiple agencies, including the FBI, the U.S. Army, and the Department of Justice, offering a comprehensive view of how cryptography has developed over time.

• The file is part of a larger FOIA request and has not been fully released yet.
• It includes detailed records from various government agencies, providing a broad perspective on cryptographic practices.
• The information is intended to inform the public about the historical and technical aspects of cryptography.
• The release underscores the importance of cryptographic security in maintaining confidentiality, integrity, and authenticity in digital communication.

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