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Cryptography > Communication System Using Cryptography > Fiber Optic Network Fiber Optic NetworkFiber Optic Network patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.10/25/07 - 20070248229 - Quantum cipher communication system and method of setting average photon number at communication terminal A quantum cipher communication system performs communication processing based on quantum cipher. It may have a first communication terminal, a second communication terminal, and a communication path that connects them. The first communication terminal may contain an optical source, a first light-separating device, optical paths, a light-synthesizing device, a second ... 09/27/07 - 20070223698 - Quantum cryptography communication system In a system carrying out cryptography communication using a quantum, it is aimed to correctly verify a quantum state received at the commit phase according to the quantum bit string commitment system, even if not maintaining the quantum state until the open phase but immediately observing the quantum state. According ... 08/30/07 - 20070201698 - Key management device and method for providing security service in ethernet-based passive optical network A key management device and method which is required for provision of a security service in an EPON vulnerable to security breaches due to characteristics of Ethernet. A session key distribution function is performed in such a manner that, during the process of communication setup between an OLT and an ... 08/02/07 - 20070177735 - Quantum secret splitting based on non-orthogonal multi-particle states Systems and methods for quantum secret splitting based on non-orthogonal multi-particle states are disclosed. The method includes preparing at a sender (“Charlie”) two qubits each of which can be in one of two non-orthogonal states and distributing the qubits to respective parties Alice and Bob. The method also includes measuring ... 07/12/07 - 20070160212 - Modulator autocalibration methods for quantum key distribution Methods for calibrating the modulators in a QKD system (100) are disclosed. The methods include setting the voltage (VB) of Bob's modulator (MB) to a positive value and then adjusting the voltage (VA) of Alice's modulator (MA) in both the positive and negative direction to obtain overall relative phase modulations ... 06/14/07 - 20070133800 - Method for setting security channel based on mpcp between olt and onus in epon, and mpcp message structure for controlling frame transmission Provided is a method for setting a security channel between an OLT and at least one ONU in an EPON. In detail, a channel is generated by which the OLT makes a reciprocal security capability agreement with the ONU that wants to set a security channel in a discovery interval ... 06/14/07 - 20070133799 - Detector autocalibration in qkd systems A method (300) of performing photon detector autocalibration in quantum key distribution (QKD) system (200) is disclosed. The method (300) includes a first act (302) of performing a detector gate scan to establish the optimum arrival time of a detector gate pulse (S3) that corresponds with a maximum number of ... 06/07/07 - 20070127718 - Method and apparatus for generating true random numbers by way of a quantum optics process A method and apparatus for generating true random numbers by way of a quantum optics process uses a light source to produce a beam which illuminates a detector array. The detectors of the array are associated with random numbers values. Detection of a photon by one of the detectors yields ... 05/24/07 - 20070116286 - quantum communication system A measuring unit for determining information from an input signal, the unit comprising a decoder configured to perform a measurement on said input signal using two operators, a first operator configured to distinguish between two orthogonal states of said input signal and a second operator selected from an inverting operator ... 05/03/07 - 20070098174 - Narrow-band single-photon source and qkd system using same A narrow-band single-photon source (10) is disclosed, along with a QKD system (200) using same. The single-photon source is based on spontaneous parametric downconversion that generates signal and idler photons (PS and PI) as an entangled photon pair. Narrow-band signal photons are generated by selectively narrow-band-filtering the idler photons. This ... 04/05/07 - 20070076883 - Any-point-to-any-point (ap2ap) quantum key distribution protocol for optical ring network Apparatus for distributing a quantum key between nodes Alice and Allie, comprising a coupler that splits generated photon pulses into first and second pulses P1 and P2; and an interface that transmits the P1's and P2's into a network. The P1's are received after modulation by Alice with respective phases ... 02/01/07 - 20070025551 - Quantum key distribution apparatus & method A quantum key distribution (QKD) system is provided that makes use of a quantum signal of polarized photons and comprises a QKD device and complimentary QKD apparatus. The QKD device has a QKD subsystem comprising one of a QKD transmitter and receiver for inter-working with a complimentary QKD receiver or ... 12/14/06 - 20060280304 - Apparatus and method for all-optical encryption and decryption of an optical signal The present invention relates to an apparatus and method for the encryption and decryption of optically transmitted data, and more particularly to the encryption and decryption of optical data transmitted and received using only optical components. Because only optical components are used, the encryption and decryption is independent of the ... 11/23/06 - 20060262930 - Phase locking in a multi-channel quantum communication system A communication system adapted to use wavelength (frequency) division multiplexing for quantum-key distribution (QKD) and having a transmitter coupled to a receiver via a transmission link. In one embodiment, the receiver is adapted to (i) phase-shift a local oscillator (LO) signal generated at the receiver, (ii) combine the LO signal ... 11/16/06 - 20060256966 - Methods and apparatus for monitoring the integrity of a quantum channel supporting multi-quanta pulse transmission A transmitter classifies quantum pulses into supervisory pulses and message pulses, and assigns each message pulse to a message bit. Each message pulse is then encoded using a coding base randomly selected from a set of coding bases, and with a polarity relative to the coding base that depends on ... 10/26/06 - 20060239460 - Qkd system detector autocalibration based on bit-error rate In a quantum key distribution (QKD) system, a method of autocalibrating the gating of a single-photon detector (SPD) unit is disclosed. The method includes exchanging photon signals (P1, P2) to establish a bit-error rate (BER). The method also includes performing a detector gate signal timing scan (314) that varies the ... 09/07/06 - 20060198521 - One-way synchronization of a two-way qkd system A method of synchronizing the operation of a two-way QKD system by sending a sync signal (SC) in only one direction, namely from one QKD station (ALICE) to the other QKD station (BOB). The one-way transmission greatly reduces the amount of light scattering as compared to two-way sync signal transmission. ... 06/08/06 - 20060120529 - Quantum cryptography protocol An apparatus and method for implementing a quantum cryptography system encoding bit values on approximations of elementary quantum systems with provable and absolute security against photon number splitting attacks. The emitter encodes the bit values onto pairs of non-orthogonal states belonging to at least two sets, and such that there ... 05/04/06 - 20060093143 - Method and system for generating shared information A sender sends original random-number data to a receiver through a quantum channel. The receiver generates a raw key from information received through the quantum channel and notifies the received information to the sender. The sender performs received-bit comparison and basis reconciliation based on the received information and provisionally shares ... 04/20/06 - 20060083376 - Quantum cryptography communication method, quantum cryptography communication apparatus, and quantum cryptography communication system In quantum cryptography communication, a sequence of signals in the form of quantum states randomly selected from a plurality of quantum states each having a different phase modulation angle is transmitted from a data transmitting apparatus. In a data receiving apparatus, if the sequence of samples is received, a plurality ... 03/23/06 - 20060062389 - Transmission of generalized scalable bit-streams A method of encrypting a transmission unit of a generalized scalable bit-stream includes, for each atom of the transmission unit, concatenating bit-stream segments that map to the atom to obtain data for each atom. The data for a logically first atom of the plurality of atoms of the multi-dimensional scalable ... 03/16/06 - 20060056631 - Tests of quantum information Quantum testing can compare unknown photon states in a manner suitable for a validation check of a quantum digital signature, testing of the operation of a quantum gate, or detecting of entanglement. The effect of the QSC system can be used to entangle input photon states. QSC system can include ... 03/16/06 - 20060056630 - Method to support secure network booting using quantum cryptography and quantum key distribution A method and system to support secure booting and configuration. The mechanism employs an optical link comprising a quantum channel that is used to send data encoded as quantum bits (qubits) via respective photons. Qubits encoded using a first random basis at the client and are sent to the boot ... 02/09/06 - 20060029229 - Qkd station with emi signature suppression Methods and systems for suppressing the electromagnetic interference (EMI) signature generated by a QKD station are disclosed. One of the methods includes generating two or more modulator drive signals corresponding to two or more of the n possible modulator states of the particular QKD protocol. The modulator drive signals are ... 02/02/06 - 20060023885 - Two-way qkd system with backscattering suppression Systems and methods for suppressing the unwanted detection of backscattered light in a two-way quantum key distribution (QKD) system is disclosed. The system includes a first QKD station that has two or more laser sources that emit light at different wavelengths, and corresponding two or more sets of detectors. In ... 01/26/06 - 20060018476 - Key path generation and exchange of cryptographic keys using path length noise Apparatus for sending cryptographic key information through a turbulent medium features a radiation generator in a first enclosure for emitting radiation at a predetermined wavelength through first launching means for launching the radiation into turbulent media. A second launching means in a second enclosure is located a distance from the ... 01/26/06 - 20060018475 - Kd systems with robust timing QKD systems having timing systems and timing method that allow for QKD to be performed in actual field conditions associated with practical commercial applications of quantum cryptography. The QKD system includes optical modems in each QKD station. Each modem has a circulator with an optical receiver and an optical transmitter ... 01/19/06 - 20060013397 - Channel adapter managed trusted queue pairs An InfiniBand™ Channel Adapter encrypts or decrypts user data on-the-fly. The user data is read from system memory and encrypted in by the Channel Adapter before sending it to a network. Similarly received data is decrypted on the fly before storing it in system memory. The encryption/decryption keys are preferably ... 01/19/06 - 20060013396 - Communication system using quantum cryptography and comprising switching stations A communication system using quantum cryptography, comprising subscriber stations (1.i, 2.i) which are connected to quantum channels (3) and quantum-cryptographic devices (10, 11) which are associated with the quantum channels for generating a quantum key, wherein several interconnected switching stations (1, 2) are provided to which the subscriber stations (1,i, ... 09/22/05 - 20050207580 - Packet-based and pseudo-packet-based cryptographic synchronization systems and methods The disclosed technology provides a system and method of synchronizing cryptographic operation between a transmitter and a receiver. A transmitter can communicate encrypted data to a receiver according to a first communications protocol, and communicate a transmitter number and a portion of the encrypted data to the receiver according to ... 09/22/05 - 20050207579 - Methods and apparatus for confidentially protection for fibre channel common transport Methods and apparatus are provided for improving message-based security in a Fibre Channel network. More specifically, the present invention relates to methods and apparatus for providing confidentiality for Fibre Channel control messages encapsulated within Common Transport Information Units. Control messages transported with the Fibre Channel Common Transport protocol, and passed ... 06/23/05 - 20050135620 - Secure quantum key distribution using entangled photons A system and method of implementing quantum key distribution are provided that possess increased data rates and enhanced security. These increased data rates are provided through the use of biphotons. Through encoding bits of information on the intra-biphoton delay time and enabling separate polarization bases for each of the photons ... ### FreshPatents.com Support |