US5020106A — Process for the cryptographic processing of data …

Claim 1

Independent Claim 174 words

Process for the cryptographic processing of data, wherein a data entity containing a clear text and data transmission routine and a coded text entity containing cryptodata and data transmission routines, are conducted in the form of packets to a cryptographic system, which comprises at least one coding/decoding generator and which produces on the output side signals containing the cryptodata or the clear data, respectively, comprising the steps of: detecting, in a first part of the cryptographic system, the data transmission routines within the data entity or the coded text entity, respectively; processing, in a second part of the cryptographic system, only the clear text or the cryptodata by at least one coding/decoding generator; and, combining the clear text present after processing as the cryptodata or the cryptodata present after processing as the clear text, with the detected data transmission routines such that the coded text entity is produced as the output signal of the cryptographic system during a coding operation and the data entity is produced as the output signal during a decoding operation.

Claim 2

Dependent Claim 174 words

Process for the cryptographic processing of data, wherein a data entity containing a clear text and data transmission routine and a coded text entity containing cryptodata and data transmission routines, are conducted in the form of packets to a cryptographic system, which comprises at least one coding/decoding generator and which produces on the output side signals containing the cryptodata or the clear data, respectively, comprising the steps of: detecting, in a first part of the cryptographic system, the data transmission routines within the data entity or the coded text entity, respectively; processing, in a second part of the cryptographic system, only the clear text or the cryptodata by at least one coding/decoding generator; and, combining the clear text present after processing as the cryptodata or the cryptodata present after processing as the clear text, with the detected data transmission routines such that the coded text entity is produced as the output signal of the cryptographic system during a coding operation and the data entity is produced as the output signal during a decoding operation.

Claim 3

Dependent Claim 34 words

Process according to claim 1, wherein detection of the data transmission routines is effected in a frame recognition circuit, whereby a control signal is produced to discontinue operation of at least one coding/decoding generator.

Claim 4

Dependent Claim 46 words

Process according to claim 2, wherein the first part of the cryptographic system is synchronized with an inlet cycle and a working cycle is produced for the second part of the cryptographic system by an "AND" logic combination of the inlet cycle with the control signal.

Claim 5

Dependent Claim 11 words

Process according to claim 3, wherein the inlet cycle is symmetrical.

Claim 6

Dependent Claim 43 words

Process according to claim 4, wherein an unchanged data entity or a coded text entity is passed on within the first part of the cryptographic system, and the clear text or the cryptodata are transmitted within the second part of the cryptographic system.

Claim 7

Dependent Claim 52 words

Process according to claim 5, wherein the clear text is filtered out from the data entity and the cryptodata is filtered out from the coded text entity by the operation of a first flip-flop element in the working cycle, said flip-flop element being located in the second part of the cryptographic system.

Claim 8

Dependent Claim 31 words

Process according to claim 6, wherein the data entity and the coded text entity, respectively, are conducted in synchronism with the inlet cycle through the first part of the cryptographic system.

Claim 9

Dependent Claim 28 words

Process according to claim 7, wherein the clear text or the cryptodata are conducted in synchronism with the working cycle through the second part of the cryptographic system.

Claim 10

Dependent Claim 17 words

Process according to claim 8, wherein at least one coding/decoding generator is operated in the working cycle.

Claim 11

Dependent Claim 48 words

Process according to claim 9, wherein said combining of the clear text present after processing as cryptodata, or the cryptodata present after processing as the clear text, with the data transmission routines is effected in a 2:1 multiplexer unit, located within the first part of the cryptographic system.

Claim 12

Dependent Claim 40 words

Process according to claim 10, wherein said combining takes place bit by bit and each bit of the clear text or the cryptodata of the unchanged data entity or the coded text entity are replaced by cryptodata or clear text.

Claim 13

Dependent Claim 45 words

Process according to claim 11, wherein combination of the cryptodata or the clear text with the data transmission routines is effected by operating a second flip-flop element in the inlet cycle, said second flip-flop element being located in the first part of the cryptographic system.

Claim 14

Dependent Claim 51 words

Process according to claim 12, wherein the clear text is replaced by routine data of a routine generator located within the second part of the cryptographic system, said generator being selectively activated as need in place of the at least one coding/decoding generator and operated in synchronism with the working cycle.

Claim 15

Dependent Claim 13 words

Process according to claim 13, wherein said routine data is key exchange information.

Claim 16

Dependent Claim 15 words

Process according to claim 13, wherein a self-synchronizing process is used for coding and decoding.

Claim 17

Dependent Claim 75 words

Cryptographic system for the coding of clear text and the decoding of cryptodata, with a clear text interface and at least one coding/decoding generator, said cryptographic system comprising: a two stage construction, wherein a first part of the cryptographic system includes a frame recognition circuit and a 2:1 multiplexer unit and, a second part of the cryptographic system includes at least one coding/decoding generator, a routine generator and a routine receiver which transmit routine data.

Claim 18

Dependent Claim 75 words

Cryptographic system for the coding of clear text and the decoding of cryptodata, with a clear text interface and at least one coding/decoding generator, said cryptographic system comprising: a two stage construction, wherein a first part of the cryptographic system includes a frame recognition circuit and a 2:1 multiplexer unit and, a second part of the cryptographic system includes at least one coding/decoding generator, a routine generator and a routine receiver which transmit routine data.

Claim 19

Dependent Claim 19 words

Cryptographic system according to claim 15, wherein said routine data is transmitted for exchange of keys between communicating systems.

Claim 20

Dependent Claim 57 words

Cryptographic system according to claim 16, wherein an "AND" logic element is provided in the first part, which produces a working cycle for the second part of the cryptographic system from an inlet cycle controlling the first part and a control signal generated by the frame recognition circuit, said working cycle being different from the inlet cycle.

Claim 21

Dependent Claim 31 words

Cryptographic system according to claim 18, wherein a first flip-flop element is located in the second part of the cryptographic system, which may be operated in synchronism with the working cycle.

Claim 22

Dependent Claim 29 words

Cryptographic system according to claim 19, wherein a second flip-flop element is located in the first part of the cryptographic system for operation in synchronism with the inlet cycle.

Claim 23

Dependent Claim 31 words

Cryptographic system according to claim 20, wherein an alternating switch is provided in the second part of the cryptographic system, for selectively actuating either the coding/decoding generator or the routine generator.

Claim 24

Dependent Claim 21 words

Cryptographic system according to claim 21, further comprising a separate coding and decoding units, with a separate coding and decoding generator.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1994-05-27	1994-11-26	1995-05-28	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1998-05-27	1998-11-26	1999-05-28	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2002-05-27	2002-11-26	2003-05-28	$7700.00	Window Closed / Lapsed

Process for the cryptographic processing of data and cryptographic systems

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