Process for the cryptographic processing of data and cryptographic systems
Patent 5020106 Issued on May 28, 1991. Estimated Expiration Date: 
February 8, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 8, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3627928 3868631 Coded data transmission system Device for encrypting each input data bit by at least one keying bit decided by a code pattern and a bit pattern of a predetermined number of preceding encrypted bits Method and apparatus for transmitting and receiving encoded data Coded data transmission system Receiver capable of quickly establishing stable frame synchronization Patent #: 4790013 InventorsAssigneeApplicationNo. 476626 filed on 02/08/1990US Classes:713/160Packet header designating cryptographically protected dataExaminersPrimary: Tarcza, Thomas H.Assistant: Cain, David Attorney, Agent or FirmForeign Patent References
International ClassH04L 009/00Foreign Application Priority Data1989-02-08 CHAbstractIn a process for the cryptographic processing of data in a cryptographic system, processing takes place in two parts. In the first part the data transmission routines within a data entity and a coded text entity are detected. The clear text and the cryptographic are separately processed cryptographically in the second part and then recombined in the first part with the data transmission routines.Other References
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