System and method for communicating encrypted data

Details System and method for communicating encrypted data System and method for communicating encrypted data

2006-02-27

2010-02-23

Zand, Kambiz (Department: 2434)

Cryptography

Communication system using cryptography

Symmetric key cryptography

C380S244000, C380S267000

Reexamination Certificate

active

07668314

ABSTRACT:
An encrypted data communication system for communicating an encrypted stream as an encrypted data stream from a device at transmitting end to a device at receiving end to suppress the effect of an erroneous detection of a dummy code is disclosed. A device at transmitting end generates a data stream having the bit sequence of a marker for determination, a synchronization marker and a location identification code after the data, encrypts the bit sequence of the data and the marker for determination and transmits the encrypted stream. A device at receiving end receives the encrypted stream, detects the bit sequence of the synchronization marker and the location identification code and decrypts the encrypted stream. In the case where the bit sequence of the data and the marker for determination is decrypted, the detection of the valid bit sequence is determined, while the detection of a dummy bit sequence is determined otherwise.

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