have taken on the role of supporting security for commercial and sensitive but unclassified applications. NSA's certification of the unclassified NIST-selected AES algorithm for classified use "in NSA approved systems" suggests that, in the future, NSA may use more non-classified algorithms. The KG-245A and KG-250 use both classified and unclassified algorithms. The NSA Information Assurance Directorate is leading the Department of Defense Cryptographic Modernization Program, an effort to transform and modernize Information Assurance capabilities for the 21st century. It has three phases: Replacement – All at risk devices to be replaced. Modernization – Integrate modular programmable/embedded crypto solutions. Transformation – Be compliant to Global Information Grid/NetCentric requirements. NSA has helped develop several major standards for secure communication: the Future Narrow Band Digital Terminal (FNBDT) for voice communications, High Assurance Internet Protocol Interoperability Encryption- Interoperability Specification (HAIPE) for computer networking and Suite B encryption algorithms. NSA encryption by type of application The large number of encryption systems that NSA has developed can be grouped by application: Record traffic encryption During World War II, written messages (known as record traffic) were encrypted off line on special, and highly secret, rotor machines and then transmitted in five letter code groups using Morse code or teletypewriter circuits, to be decrypted off-line by similar machines at the other end. The SIGABA rotor machine, developed during this era continued to be used until the mid-1950s, when it was replaced by the KL-7, which had more rotors. The KW-26 ROMULUS was a second generation encryption system in wide use that could be inserted into teletypewriter circuits so traffic was encrypted and decrypted automatically. It used electronic shift registers instead of rotors and became very popular (for a COMSEC device of its era), with over 14,000 units produced. It was replaced in the 1980s by the more compact KG-84, which in turn was superseded by the KG-84-interoperable KIV-7. Fleet broadcast U.S. Navy ships traditionally avoid using their radios to prevent adversaries from locating them by direction finding. The Navy also needs to maintain traffic security, so it has radio stations constantly broadcasting a stream of coded messages. During and after World War II, Navy ships copied these fleet broadcasts and used specialized call sign encryption devices to figure out which messages were intended for them. The messages would then be decoded off line using SIGABA or KL-7 equipment. The second generation KW-37 automated monitoring of the fleet broadcast