The design for the Chinook originates from the Vertol Model 107, which was produced by Boeing Vertol in the early 1960s. The Vertol was one of the pioneer twin rotor cargo helicopters developed by Boeing. Chinooks are now used in both military and civilian roles by more than 16 nations.
SHA-1 HMAC Generation. In cryptography, a keyed-hash message authentication code (HMAC) is a specific type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key. It may be used to simultaneously verify both the data integrity and the authentication of a message, as with any MAC.
The Standard Carrier Alpha Code (SCAC) is a unique two-to-four-letter code used to identify transportation companies. NMFTA developed the SCAC identification codes in the mid 1960's to facilitate computerization in the transportation industry.