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Cryptography > Communication System Using Cryptography > Symmetric Key Cryptography > Symmetric Key Synchronization > Nonlinear Or Chaotic System Nonlinear Or Chaotic SystemNonlinear Or Chaotic System 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.10/11/07 - 20070237332 - Method and system for encrypting and decrypting data using an external agent A communication system including a transmitter, a receiver, a communication link (for example, a TMDS-like link), and preferably also an external agent with which the transmitter and receiver can communicate, in which video data (or other data) are encrypted, the encrypted data are transmitted from the transmitter to the receiver, ... 06/14/07 - 20070133801 - Pulse position based-chaotic modulation (ppb-cm) communication system and method A PPB-CM communication system and method. The PPB-CM communication system includes a transmitter which splits a symbol period, which is a transmission unit of a communication signal, into at least a pair of parts, inserts a data signal into one of the parts, and transmits a communication signal having the ... 05/31/07 - 20070121945 - Adjustable chaotic signal generator using pulse modulation for ultra wideband (uwb) communications and chaotic signal generating method thereof An adjustable chaotic signal generator using pulse modulation for UWB communications, and a chaotic signal generating method thereof are provided. The chaotic signal generator for UWB communications includes a plurality of pulse generators which generates pulses of different frequencies; at least one combiner which combines the pulses generated at the ... 05/31/07 - 20070121944 - Transmitter using chaotic signal The invention provides a transmitter using a chaotic signal which turns on/off a supply voltage of a chaotic signal generator in accordance with a transmitted digital data signal, without requiring a separate modulator for combining the chaotic signal and the digital data signal. The transmitter uses a chaotic signal for ... 04/05/07 - 20070076884 - Quantum key distribution system A method is provided for distributing quantum cryptographic keys. The method includes receiving a first quantum signal from an initial quantum key generating transmitter. Following correspondence with the initial quantum key generating transmitter, a first quantum key is generated. A second quantum signal is transmitted to a recipient quantum key ... 03/22/07 - 20070064945 - Quantum communication system A quantum communication system comprising a sending unit and a receiving unit, said sending unit comprising a photon source assembly configured to output a stream of pulses of light having at least two different intensities and a memory configured to store information for determining which pulses should be reference pulses ... 03/08/07 - 20070053517 - Method and apparatus for the compression and decompression of image files using a chaotic system A system for the compression and decompression of image files is provided. A library of basic waveforms is produced by applying selected digital initialization codes to a chaotic system. Each basic waveform is in one-to-one correspondence with an initialization code. A weighted sum of selected basic waveforms is used to ... 02/01/07 - 20070025553 - Authentication of data transmitted in a digital transmission system A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a key of a respective encryption algorithm, and outputting ... 02/01/07 - 20070025552 - Authentication of data transmitted in a digital transmission system A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a key of a respective encryption algorithm, and outputting ... 01/25/07 - 20070019811 - Cryptographic key, encryption device, encryption/decryption device, cryptographic key management device, and decryption device A cryptographic key 1 constituted to be freely attachable and detachable to/from a personal computer 2 encrypting and decrypting data by use of a cipher key includes: a pseudo random number generator 14 for generating a pseudo random number of a chaotic time series based on a data size of ... 11/16/06 - 20060256967 - Authentication of data transmitted in a digital transmission system A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a key of a respective encryption algorithm, and outputting ... 10/05/06 - 20060222180 - Chip-scale transmitter for quantum cryptography A quantum cryptographic key distribution (QKD) transmitter includes an integrated photonic circuit configured to distribute encryption key material using quantum cryptographic mechanisms. The integrated photonic circuit further includes a first photon source, an interferometer coupled to the first photon source and a phase modulator coupled to the interferometer and configured ... 09/07/06 - 20060198522 - Wide band-dcsk modulation method, transmitting apparatus thereof, wide band-dcsk demodulation method, and receiving apparatus thereof Provided are a wide band-differential chaos shift keying modulation method, a transmitting apparatus adopting the wide band-differential chaos shift keying modulation method, a wide band-differential chaos shift keying demodulation method, and a receiving apparatus adopting the wide band-differential chaos shift keying demodulation method. The wide band-differential chaos shift keying modulation ... 06/01/06 - 20060115086 - Self-authenticating quantum random number generator A quantum random number generator uses measurements of a quantum state to generate a random value and to authenticate that the quantum state had the required properties for generation of a random series having the desired statistics. One exemplary embodiment generates an entangled photon pair in the singlet Bell state, ... 05/18/06 - 20060104448 - Data transmission method and apparatus and data receiving method and apparatus for multiple access in chaotic communication system A data transmission method and apparatus and a data receiving method and apparatus provide for multiple access in a chaotic communication system. The data transmission method includes arranging a template chaotic signal at a predetermined position of a data frame to be transmitted, the predetermined position being allocated to a ... 04/27/06 - 20060088164 - Cryptographic system and methods using a one way multidimensional function A cryptographic method and systems using a keyed one-way function. A sending device uses the keyed one-way function to authenticate one or more receiving devices prerequisite to communication. ... 04/06/06 - 20060072754 - Chaotic communication system and method using modulation of nonreactive circuit elements A chaotic communication system employs transmitting and receiving chaotic oscillating circuits. One improvement to first-generation systems is the ability to modulate a nonreactive element in the transmitting circuit, thus increasing modulation bandwidth. Other features include insertion of a gain control amplifier in a chaotic receiver; signal filtering in chaotic transmitters ... 01/05/06 - 20060002554 - Apparatus for controlling chaos using oscillation quenching The present invention relates to an apparatus for controlling chaos using oscillation quenching, and more particularly, to an apparatus for controlling chaos using oscillation quenching, wherein a chaos system to be controlled can be easily stabilized by coupling the chaos system with another chaos system or a periodic system that ... 12/08/05 - 20050271207 - Method and system for chaotic digital signature, encryption, and authentication The method and system for chaotic digital signature, encryption, and authentication using a chaos generator, which operates in the domain of polynomial integer numbers of arbitrary magnitude. ... ### FreshPatents.com Support |