G09C1/00	7	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)	G09C1/00	G09C1/00		2715
G09C1/02	8	by using a ciphering code in chart form	G09C1/02	G09C1/02		79
G09C1/04	8	with sign carriers or indicators moved relative to one another to positions determined by a permutation code, or key, so as to indicate the appropriate corresponding clear or ciphered text	G09C1/04	G09C1/04		262
G09C1/06	8	wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member	G09C1/06	G09C1/06		32
G09C1/08	9	the connections being mechanical	G09C1/08	G09C1/08		103
G09C1/10	9	the connections being electrical	G09C1/10	G09C1/10		101
G09C1/12	10	comprising contact-bearing permutation discs	G09C1/12	G09C1/12		98
G09C1/14	9	involving removable or interchangeable coding numbers, e.g. master tapes, punched cards	G09C1/14	G09C1/14		51
G09C3/00	7	Typewriters for ciphering or deciphering cryptographic text (marking record carriers G06K)	G09C3/00	G09C3/00		31
G09C3/02	8	with auxiliary keys or keyboards acting on the original keys or keyboards	G09C3/02	G09C3/02		40
G09C3/04	8	wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member	G09C3/04	G09C3/04		10
G09C3/06	9	the connections being mechanical	G09C3/06	G09C3/06		78
G09C3/08	9	the connections being electrical	G09C3/08	G09C3/08		45
G09C3/10	9	involving removable or interchangeable coding members, e.g. master tapes, punched cards	G09C3/10	G09C3/10		18
G09C5/00	7	Ciphering apparatus or methods not provided for in the preceding groups, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages	G09C5/00	G09C5/00		1053
