cryptosystem

noun
cryp·​to·​sys·​tem | \ˌkrip-tō-ˈsi-stəm \

Definition of cryptosystem 

: a method for encoding and decoding messages

First Known Use of cryptosystem

1949, in the meaning defined above

History and Etymology for cryptosystem

crypto- + system

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The first known use of cryptosystem was in 1949

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