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Class Information
Number: 380/256
Name: Cryptography > Communication system using cryptography > Fiber optic network
Description: Subject matter including plural nodes joined by an optical waveguide for the transmission or reception of light waves.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6707915 |
Data transfer verification based on unique ID codes |
Mar. 16, 2004 |
| 6704420 |
Device for sending or receiving a signal encrypted using deterministic chaos |
Mar. 9, 2004 |
| 6678379 |
Quantum key distribution method and apparatus |
Jan. 13, 2004 |
| 6577732 |
Hierarchical encryption technique for dense wavelength division multiplexed systems using a wavelength bus architecture |
Jun. 10, 2003 |
| 6529601 |
Method and apparatus for polarization-insensitive quantum cryptography |
Mar. 4, 2003 |
| 6513709 |
Optical transaction card system |
Feb. 4, 2003 |
| 6438234 |
Quantum cryptography device and method |
Aug. 20, 2002 |
| 6289104 |
Free-space quantum cryptography system |
Sep. 11, 2001 |
| 6275588 |
Apparatus and method for performing and controlling encryption/decryption for data to be transmitted on local area network |
Aug. 14, 2001 |
| 6272224 |
Method and apparatus for quantum distribution of an encryption key |
Aug. 7, 2001 |
| 6028935 |
Cryptographic receiver |
Feb. 22, 2000 |
| 6018582 |
Optical transmission system implementing encrypting by deterministic chaos |
Jan. 25, 2000 |
| 6002773 |
Method and apparatus for encryption |
Dec. 14, 1999 |
| 5999285 |
Positive-operator-valued-measure receiver for quantum cryptography |
Dec. 7, 1999 |
| 5966224 |
Secure communications with low-orbit spacecraft using quantum cryptography |
Oct. 12, 1999 |
| 5953421 |
Quantum cryptography |
Sep. 14, 1999 |
| 5920627 |
Encryption device and decryption device for information conveyed by asynchronous transfer mode cells |
Jul. 6, 1999 |
| 5870474 |
Method and apparatus for providing conditional access in connection-oriented, interactive networks with a multiplicity of service providers |
Feb. 9, 1999 |
| 5864625 |
Methods and apparatus for secure optical communications links |
Jan. 26, 1999 |
| 5854840 |
Data transmission protocol method and apparatus |
Dec. 29, 1998 |
| 5850441 |
System and method for key distribution using quantum cryptography |
Dec. 15, 1998 |
| 5793871 |
Optical encryption interface |
Aug. 11, 1998 |
| 5768378 |
Key distribution in a multiple access network using quantum cryptography |
Jun. 16, 1998 |
| 5764765 |
Method for key distribution using quantum cryptography |
Jun. 9, 1998 |
| 5757912 |
System and method for quantum cryptography |
May. 26, 1998 |
| 5737420 |
Method for secure data transmission between remote stations |
Apr. 7, 1998 |
| 5712912 |
Method and apparatus for securely handling a personal identification number or cryptographic key using biometric techniques |
Jan. 27, 1998 |
| 5675648 |
System and method for key distribution using quantum cryptography |
Oct. 7, 1997 |
| 5623357 |
Method and apparatus for the monitoring and demarcation of synchronous digital hierarchy networks |
Apr. 22, 1997 |
| 5592554 |
Method for data security in a digital telecommunication system |
Jan. 7, 1997 |
| 5515438 |
Quantum key distribution using non-orthogonal macroscopic signals |
May. 7, 1996 |
| 5473696 |
Method and apparatus for combined encryption and scrambling of information on a shared medium network |
Dec. 5, 1995 |
| 5442702 |
Method and apparatus for privacy of traffic behavior on a shared medium network |
Aug. 15, 1995 |
| 5410600 |
Pre-scramble encoding method and apparatus for digital communication |
Apr. 25, 1995 |
| 5323463 |
Method and apparatus for controlling the spectral content of a data stream |
Jun. 21, 1994 |
| 5311592 |
Sagnac interferometer based secure communication system |
May. 10, 1994 |
| 5307410 |
Interferometric quantum cryptographic key distribution system |
Apr. 26, 1994 |
| 5243649 |
Apparatus and method for quantum mechanical encryption for the transmission of secure communications |
Sep. 7, 1993 |
| 5239581 |
Secret communication apparatus |
Aug. 24, 1993 |
| 5191614 |
Secure communication system |
Mar. 2, 1993 |
| 5182772 |
Method and apparatus for encoding, transmitting, receiving and de-coding information |
Jan. 26, 1993 |
| 5163092 |
Parallel scrambler used in sonet data transmission |
Nov. 10, 1992 |
| 5150242 |
Integrated optical computing elements for processing and encryption functions employing non-linear organic polymers having photovoltaic and piezoelectric interfaces |
Sep. 22, 1992 |
| 5144669 |
Method of communicating digital signals and receiver for use with such method |
Sep. 1, 1992 |
| 5136641 |
Scrambled video digital transmission link |
Aug. 4, 1992 |
| 5063595 |
Optical communications network |
Nov. 5, 1991 |
| 5007050 |
Bidirectional digital serial interface for communication digital signals including digitized audio between microprocessor-based control and transceiver units of two-way radio communications eq |
Apr. 9, 1991 |
| 4980913 |
Security system network |
Dec. 25, 1990 |
| 4977593 |
Optical communications network |
Dec. 11, 1990 |
| 4965881 |
Linear feedback shift registers for data scrambling |
Oct. 23, 1990 |
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