William Friedman , often referred to as the Father of American Cryptology, was interested in a wide range of cryptologic topics. He developed several practical designs to protect critical communications.
Featured here is a device he invented and dubbed "Cryptest". It is a cylindrical-type check-authenticator. Friedman intended the device to be used for both commercial and military applications. Cryptest was formally patented on 15 August 1950 and acquired for the NSA Museum on 3 March 1954.
|An NCM exhibit. (Photo by Ralph Simpson)|
Contributors and Credits:
1) Ralph Simpson <ralphenator(at)gmail.com>
2) NCM placard
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