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PCE
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DIFF Subgroup
G09C 1/02

by using a ciphering code in chart form

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system > by using a ciphering code in chart form

CPC:

Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system (cryptographic typewriters G09C3/00) > by using a ciphering code in chart form

No child classifications to compare. This is a leaf node in both IPC and CPC.