Although the device appeared to be ‘highly reliable, speedy and efficient’ Friedman’s conclusion was that ‘the degree of cryptographic security afforded by the machine is relatively low, and certainly not sufficient for governmental confidential or secret messages’ and ‘It is doubtful whether anything can be done to eliminate the more or less fatal cryptographic weakness of this model and still retain a machine and cryptographic system which will be practical for the purpose for which intended’.
Thus the Codatype remained a prototype and was not acquired by the State Department.
The device was designed by the IBM engineer Austin Robert Noll, US patent 2,116,732 (2):
(1). W.F. FRIEDMAN LETTER TO DEPT OF STATE: CRYPTOGRAPHIC SECURITY OF CODATYPE CYPHER MACHINE; S-028,605