Besides oral conversations and written language many other ways of information-transport are known: like the bush telegraph, drums, smoke signals etc. Those methods are not cryptography, still they need en- and decoding, which means that the history of language, the history of communication and the history of cryptography are closely connected to each other
The timeline gives an insight into the endless fight between enciphering and deciphering. The reasons for them can be found in public and private issues at the same time, though mostly connected to military maneuvers and/or political tasks.
One of the most important researchers on Cryptography through the centuries is
TEXTBLOCK 1/1 // URL: http://world-information.org/wio/infostructure/100437611776/100438658824
American holding company (formerly (1967-74) First National City Corporation),
incorporated in 1967, with the City Bank of New York, National Association (a bank tracing to 1812), as its principal subsidiary. The latter's name changed successively to First National City Bank in 1968 and to Citibank, N.A. (i.e., National Association), in 1976. Citicorp was the holding company's popular and trade name from its inception but became the legal name only in 1974. Headquarters are in New York City.