| 7035411 |
Encryption method and apparatus encrypting and adding signature information to qubits |
| Apr-25-2006 |
Arbitrary quantum information is input. The information of a quantum two-state system is acquired as a qubit by performing a computation in consideration of a physical system. The acquired qubit is encrypted.... |
| 7010126 |
Method for synchronizing a plurality of chaotic systems and method for multichannel communication using synchronized chaotic systems |
| Mar-7-2006 |
The present invention relates to a vertical synchronizing method and a horizontal synchronizing method of a plurality of chaotic systems and also relates to a method for multichannel communication using... |
| 7000111 |
Method for masking secret multiplicands |
| Feb-14-2006 |
A mobile terminal for use in a mobile communications system includes a SIM card storing subscriber related data. For security, the SIM card performs secret cryptographic calculations with secret numbers.... |
| 6980656 |
Chaotic communication system and method using modulation of nonreactive circuit elements |
| Dec-27-2005 |
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... |
| 6980657 |
Communications system using chaotic synchronized circuits |
| Dec-27-2005 |
A chaotic communication system employs transmitting and receiving chaotic oscillating circuits. In an embodiment of the invention employing a Chua circuit as the basic chaotic circuit, the transmitter... |
| 6973190 |
Method for protecting an electronic system with modular exponentiation-based cryptography against attacks by physical analysis |
| Dec-6-2005 |
The invention concerns a method for protecting an electronic system implementing a cryptographic calculation process involving a modular exponentiation of a quantity (x), said modular exponentiation using... |
| 6944407 |
Method and apparatus for detecting radiation |
| Sep-13-2005 |
In analyzing radiation from a communication link, single-photon counting can be used to advantage especially at low levels of radiation energy, e.g. in the detection of optical radiation. Preferred detection... |
| 6898287 |
Cryptographic system using chaotic dynamics |
| May-24-2005 |
The invention is a cryptographic system using chaotic dynamics. A chaotic system is used to generate a public key and an adjustable back door from a private key. The public key is distributed and can be... |
| 6892940 |
Encryption process employing chaotic maps and digital signature process |
| May-17-2005 |
An encryption process includes choosing a secret key and a set of permutable functions defined on a phase space for encrypting/decrypting messages, choosing a code for encoding messages to be sent as a... |
| 6792111 |
Cryptation system for packet switching networks based on digital chaotic models |
| Sep-14-2004 |
A cryptation system for information transmitted through packet switching networks masks the digital information data by combining it at the transmitting station with digital data of a certain cryptation... |
| 6788787 |
Pseudorandom number generator, stream encryption method, and stream encrypting communication method |
| Sep-7-2004 |
A chaos-generating loop includes a one dimensional mapping circuit (13) with non-linear input-output characteristics for generating chaos, a linear or non-linear AD converter (15) for converting an analog... |
| 6778314 |
Phase modulator and phase modulating method |
| Aug-17-2004 |
In case of the high-speed operation, it is difficult to ignore the time required for the voltage to rise to the level of voltage to be applied and the time to fall to 0V when the voltage is applied to... |
| 6744893 |
Receiver estimation engine for a chaotic system |
| Jun-1-2004 |
A chaotic receiver estimation engine and method of use. The estimation engine synchronizes and recovers data and performs its decision and tracking processes by mapping probability calculation results... |
| 6714648 |
IC card equipped with elliptic curve encryption processing facility |
| Mar-30-2004 |
In an IC card incorporating residual multiplier hardware for implementing a high-speed algorithm for a residual multiplication arithmetic, a method and a device capable of executing a public key encryption... |
| 6704420 |
Device for sending or receiving a signal encrypted using deterministic chaos |
| Mar-9-2004 |
Device for sending an encrypted signal, including: a source (1) for generating said signal and means (2) for intensity modulating the signal, a feedback loop which includes delay line means and non-linear... |
| 6687376 |
High-speed long code generation with arbitrary delay |
| Feb-3-2004 |
A circuit is designed with a first register circuit (364) arranged to store a state matrix. A memory circuit (710) is arranged to store a plurality of addressable matrices. A control circuit (700) is coupled... |
| 6647493 |
Method and system for authentication and electronic signature |
| Nov-11-2003 |
The method for authentication and electronic signature is of the private-key, challenge and response type between a user requesting an authorization, via, for example, a smart card and a controller--check... |
| 6631166 |
Method and apparatus for signal generation and detection using unstable periodic chaotic orbits |
| Oct-7-2003 |
A signal generator and signal receiver, as well as method of signal generation and transmission, in which selected unstable periodic orbits of a lossy chaotic system are identified and extracted, and portions... |
| 6628786 |
Distributed state random number generator and method for utilizing same |
| Sep-30-2003 |
A system and method for generating random numbers utilizing a shared or distributed source of entropy is disclosed. In one embodiment, the invention allows networked computers to generate and share entropy... |
| 6606526 |
System behavior modification for maintenance of chaos |
| Aug-12-2003 |
An accessible parameter of a chaos embodying system of a physical or biological type is monitored by extraction of measurement data and recordation thereof on a return map as a dynamic representation of... |
| 6587563 |
Cryptographic system using chaotic dynamics |
| Jul-1-2003 |
The invention is a cryptographic system using chaotic dynamics. A set of initial conditions is generated from the private key and becomes input to the chaotic system. The chaotic system generates a set... |
| 6522749 |
Quantum cryptographic communication channel based on quantum coherence |
| Feb-18-2003 |
A quantum cryptographic communication channel having: a light source; a reflector; first and second sources each capable of generating a pair of photons emitted in the form of signal and idler light beams... |
| 6370248 |
Synchronizing autonomous chaotic systems using filters |
| Apr-9-2002 |
A system for synchronizing chaotic transmitters and receivers that is less sensitive to channel effects than other known chaotic communication methods. The system employs duplicate transmitter and receiving... |
| 6363153 |
Method and apparatus for secure digital chaotic communication |
| Mar-26-2002 |
A method and apparatus that uses control of a chaotic system to produce secure digital chaotic communication. Controls are intermittently applied by a transmitter-encoder to a chaotic system to generate... |
| 6282292 |
Amplitude insensitive synchronization of nonlinear systems |
| Aug-28-2001 |
An amplitude insensitive synchronized nonlinear system (AISN) that allows communication between nonlinear systems operating in the chaotic realm which is insensitive to attenuation or signal noise affecting... |
| 6252962 |
Featureless covert communication system |
| Jun-26-2001 |
A system and method of providing featureless covert communication is described. After synchronization is achieved between a covert transmitter and a covert receiver using two channels, one of which is... |
| 6201870 |
Pseudorandom noise sequence generator |
| Mar-13-2001 |
A pseudorandom sequence generator including a first feedback shift register having at least one input and at least one output and a first controller having an output in communication with the at least... |
| 6178217 |
Nonlinear digital communications system |
| Jan-23-2001 |
A multiple access communications data and information transport system and methodology for employing the noise present in any conduit as a carrier form using wireless chaotic waveform signals supported... |
| 6078664 |
Z-transform implementation of digital watermarks |
| Jun-20-2000 |
Z-transform calculations may be used to encode (and/or decode) carrier signal independent data (e.g., digital watermarks) to a digital sample stream. Deterministic and non-deterministic components of a... |
| 6064701 |
Synchronization-based communication systems |
| May-16-2000 |
An alternative to classical spread spectrum communication systems is based on synchronization of dynamical systems which can resist noisy transmission channels, jamming, gain modulation, multiple time... |
| 6049614 |
Synchronized chaotic system and communication system using synchronized chaotic system |
| Apr-11-2000 |
A synchronized chaotic system and a communication system using the synchronized chaotic system is disclosed. The synchronized chaotic system comprises a master chaotic part and a slave chaotic part, and... |
| 6018582 |
Optical transmission system implementing encrypting by deterministic chaos |
| Jan-25-2000 |
The invention relates to an optical transmission system that implements encrypting of an information carrying signal by deterministic chaos. The system includes a transmitter (1), a receiver (4), and one... |
| 5930364 |
Synchronized chaotic system and communication system using synchronized chaotic system |
| Jul-27-1999 |
A synchronized chaotic system and a communication system using the synchronized chaotic system is disclosed. The synchronized chaotic system comprises a master chaotic part and a slave chaotic part, and... |
| 5923760 |
Chaotic communication apparatus and method for use with a wired or wireless transmission link |
| Jul-13-1999 |
A covert communication apparatus exploits chaotic dynamics in the multi-dimensional phase space with a continuous number of states and wide internal spectral bandwidth. The information modulates a chaotically... |
| 5857025 |
Electronic encryption device and method |
| Jan-5-1999 |
A device and method is provided using a split processor based architecture to provide physical security of critical information by implementing a required protocol before releasing critical information.... |
| 5729607 |
Non-linear digital communications system |
| Mar-17-1998 |
A multiple access communications data and information transport system and methodology for employing the noise present in any conduit as a carrier form using wireless chaotic waveform signals supported... |
| 5680462 |
Information encoder/decoder using chaotic systems |
| Oct-21-1997 |
The present invention discloses a chaotic system-based information encoder and decoder that operates according to a relationship defining a chaotic system. Encoder input signals modify the dynamics of... |
| 5677956 |
Method and apparatus for data encryption/decryption using cellular automata transform |
| Oct-14-1997 |
A method and apparatus for encrypting and decrypting data using a transform which is a function of input data and a basis. After the input data is received, the basis is generated from key values specifying... |
| 5655022 |
Apparatus and method for synchronizing nonlinear systems using filtered signals |
| Aug-5-1997 |
A filtered cascaded synchronized nonlinear system includes a nonlinear transmitter having stable first and second subsystems. The first subsystem produces a first transmitter signal for driving the second... |
| 5479513 |
Fast and secure encryption-decryption method based on chaotic dynamics |
| Dec-26-1995 |
A method and system for the secure encryption of information. The method comprises the steps of dividing a message of length L into its character components; generating m chaotic iterates from m independent... |
| 5473694 |
Synchronization of nonautonomous chaotic systems |
| Dec-5-1995 |
A cascaded synchronized system includes a nonlinear transmitter, a nonlinear cascaded receiver, a phase-detector/controller coupled to the receiver, and a signal generator also coupled to the receiver.... |
| 5398284 |
Cryptographic encoding process |
| Mar-14-1995 |
The digital information is encrypted by first performing a preselected number of CRC iterations or partial convolutions by multiplication with a mask in the Galois Field. Before the CRC operation is completed,... |
| 5379346 |
Cascading synchronized chaotic systems |
| Jan-3-1995 |
A cascaded synchronized nonlinear system includes a nonlinear transmitter having stable first and second subparts. The first subpart produces a first transmitter signal for driving the second subpart and... |
| 5365589 |
Method and apparatus for encryption, decryption and authentication using dynamical systems |
| Nov-15-1994 |
A method and apparatus provide encryption, decryption and authentication of messages using dynamical systems. The method and apparatus preferably operate on an information stream which may comprise message... |
| 5291555 |
Communication using synchronized chaotic systems |
| Mar-1-1994 |
A chaotic transmitter (100) operates according to preselected chaotic protocols, such as a set of Lorenz equations. Modulation is accomplished by modifying a predetermined parameter of the set of chaotic... |
| 5245660 |
System for producing synchronized signals |
| Sep-14-1993 |
A system for producing two synchronized signals comprises a nonlinear dynamical primary system and a nonlinear dynamical secondary response subsystem. The primary system comprises a nonlinear dynamical... |
| 5048086 |
Encryption system based on chaos theory |
| Sep-10-1991 |
An encryption system and method based on the mathematics of Chaos theory, which provides protection of data from unauthorized modification and use during its storage and transmission. At its core are nonlinear... |
