| 7043022 |
Packet order determining method and apparatus |
| May-9-2006 |
A transmitter adds packet transmission order information to transmitted packets using a forward error device (416) and a masking device (420). The masking device (420) receives ordering masks (610) from... |
| 7036017 |
Microprocessor configuration with encryption |
| Apr-25-2006 |
A microprocessor configuration includes a data bus for data transfer between functional units. On the bus side, each unit contains an encryption/decryption unit that is controlled synchronously by a random... |
| 7035412 |
WLAN error control |
| Apr-25-2006 |
A method in a wireless communications network is disclosed whereby errors due to incorrect transmission of scrambler seed values can be very greatly reduced. This is achieved by using a known pseudo-random... |
| 7000106 |
Methods and apparatus for kernel mode encryption of computer telephony |
| Feb-14-2006 |
Disclosed is a computer-readable medium containing program instructions for configuring a first computer so that a first telephony client on the first computer may securely communicate with a second telephony... |
| 6986038 |
Technique for synchronizing security credentials from a master directory, platform, or registry |
| Jan-10-2006 |
The present invention provides a method, system, and computer program product for synchronizing security credentials of users and/or groups of users between directories, operating system platforms, and/or... |
| 6986039 |
Technique for synchronizing security credentials using a trusted authenticating domain |
| Jan-10-2006 |
The present invention provides a method, system, and computer program product for synchronizing security credentials of users and/or groups of users between directories, operating system platforms, and/or... |
| 6980658 |
Method and apparatus for encrypting transmissions in a communication system |
| Dec-27-2005 |
Method and apparatus for encrypting transmission traffic at separate protocol layers L1, L2, and L3so that separate encryption elements can be assigned to separate types of transmission... |
| 6965674 |
System and method for providing WLAN security through synchronized update and rotation of WEP keys |
| Nov-15-2005 |
A system and method are disclosed that overcome deficiencies of prior art IEEE 802.11 WEP key management schemes. Preferred embodiments of the present system and method update WEP keys and rotate transmission... |
| 6950944 |
Security code activated access control system |
| Sep-27-2005 |
An access control system that utilizes security codes (500), a database (430), and a control device (20) is disclosed. Each security codes (500) is comprised of a unique key code... |
| 6909785 |
Method and apparatus for efficient irregular synchronization of a stream cipher |
| Jun-21-2005 |
A method and apparatus for efficiently synchronizing a stream cipher. State information is transmitted that will allow the intended recipient of the encrypted data stream to set a stream cipher generator... |
| 6882729 |
System and method for limiting access to data |
| Apr-19-2005 |
A data system includes a secured appliance capable of receiving broadcast programming and a remote control used to transmit data frames to the secured appliance. The secured appliance is provided with... |
| 6873649 |
Method and apparatus for detecting a stationary dither code |
| Mar-29-2005 |
An apparatus and method of detecting a transmission code from a received signal, where the transmission code is composed of a plurality of dithered codes. The codes can be dithered either by varying the... |
| 6870932 |
Frame number identification and ciphering activation time synchronization for a wireless communications protocol |
| Mar-22-2005 |
A received PDU is sequentially identified by an n-bit frame number (FN) and an m-bit hyper frame number (HFN), which are synchronously maintained on first and second stations. The second station determines... |
| 6778670 |
Method and apparatus for encryption and decryption |
| Aug-17-2004 |
A method and apparatus are provided for encrypting a stream of data transmitted within a frame. The method includes determining a first initialization state in a first preselected interval, and determining... |
| 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... |
| 6697490 |
Automatic resynchronization of crypto-sync information |
| Feb-24-2004 |
An apparatus and method for transmitting and receiving cryptographic information which provide a mechanism for resynchronization between a transmitter and receiver of the cryptographic information. A cryptographic... |
| 6650616 |
Transmission security for wireless communications |
| Nov-18-2003 |
A method of transmission level security, and a corresponding transmission security system, the method consists of the steps of: forming a plurality of digital signals representing a symbol to be transmitted... |
| 6594362 |
Radio data transmission apparatus |
| Jul-15-2003 |
A ciphered message contained in a radio signal is displayed as it is if a code number contained in a received radio signal does not coincide with a preliminarily registered code number. On the other hand,... |
| 6556681 |
Reconfigurable universal trainable transmitter |
| Apr-29-2003 |
A trainable transmitter comprises a transmitter, code-generation circuitry and a removable, plug-in data module. The data module includes information necessary for generating a code for a specific security... |
| 6510349 |
Adaptive data security system and method |
| Jan-21-2003 |
A system and method for data communication with adaptive security in which a send host transmits a data stream to a receive host in packets which contain an authentication data block with an authentication... |
| 6438367 |
Transmission security for wireless communications |
| Aug-20-2002 |
A method of transmission level security, and a corresponding transmission security system, the method consists of the steps of: forming a plurality of digital signals representing a symbol to be transmitted... |
| 6418224 |
Methods and apparatus for self-inverting multiple-iteration CMEA crypto-processing for improved security for wireless telephone messages |
| Jul-9-2002 |
A self-inverting enhanced CMEA encryption system suitable for use in wireless telephony. An unprocessed text message is introduced into the system and subjected to a first iteration of a CMEA process,... |
| 6385319 |
Encoding circuit and method of detecting block code boundary and establishing synchronization between scrambler and descrambler |
| May-7-2002 |
The present invention comprises the bus reset detection circuit 6 detecting a bus reset signal from the network initiation/control state machine, the bus reset identification code generation circuit 8... |
| 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... |
| 6266412 |
Encrypting speech coder |
| Jul-24-2001 |
Disclosed is an encrypting speech processor architecture that provides enhanced security without the use of external cryptosync and with minimal speech degradation. This is accomplished by incorporating... |
| 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... |
| 6240184 |
Password synchronization |
| May-29-2001 |
A system, method, and data structure provide for securely synchronizing passwords and/or other information between systems. The password-related information is stored in the systems in a secure manner,... |
| 6215876 |
Apparatus for and method of detecting initialization vector errors and maintaining cryptographic synchronization without substantial increase in overhead |
| Apr-10-2001 |
An apparatus and method for detecting erroneous initialization vectors transmitted over a communications channel and maintaining cryptographic synchronization by comparing a received vector with a predicted... |
| 6208737 |
Method and apparatus for television signal scrambling using the replacement of synchronizing and color subcarrier signals with an alternative time base inherent in a QPSK audio subcarrier |
| Mar-27-2001 |
A novel method and apparatus for scrambling a television signal includes using a synchronization separator to separate a synchronization signal from an input audio-visual signal. The synchronization signal... |
| 6182214 |
Exchanging a secret over an unreliable network |
| Jan-30-2001 |
Threshold cryptography (secret sharing) is used for exchanging a secret between a server and a client over an unreliable network. Specifically, a secret is computationally divided into N shares using a... |
| 6175312 |
Encoder and decoder microchips and remote control devices for secure unidirectional communication |
| Jan-16-2001 |
Encoder and decoder microchips suitable for use in secure unidirectional remote control devices. The encoder microchip includes circuits for performing and encoding function on an identification number... |
| 6125186 |
Encryption communication system using an agent and a storage medium for storing that agent |
| Sep-26-2000 |
An agent is permanently resident in a server as software for the purpose of cryptographic processing. In addition, another agent that is described in mobile code and contains a program for the purpose... |
| 6122376 |
State synchronized cipher text scrambler |
| Sep-19-2000 |
A state synchronized cipher text scrambler is disclosed. The state synchronized cipher text scrambler enables multiple data streams to be scrambled in parallel in such a way that the data streams are uncorrelated... |
| 6108425 |
Method and apparatus for controlling the configuration of a cryptographic processor |
| Aug-22-2000 |
The capabilities of a cryptographic module are controlled by a crypto configuration control (CCC) register that is initialized by one or more self-signed commands that are preformulated and signed with... |
| 6094487 |
Apparatus and method for encryption key generation |
| Jul-25-2000 |
An encryption key generation system generates encryption keys at both an originating terminal and a terminating terminal of a wireless network. A central controller generates a shared secret based on the... |
| 6078668 |
Apparatus and method for concealing data bursts in an analog scrambler using audio repetition |
| Jun-20-2000 |
An apparatus and method for concealing data bursts in an analog scrambler using audio repetition. What otherwise would be periodic data bursts appearing at the audio output are replaced with samples from... |
| 6078666 |
Audio signal processing method and related device with block order switching |
| Jun-20-2000 |
An audio signal processing method and unit for scrambling and descrambling audio signals accompanying video signals. The audio signal processing method comprises steps of dividing digital audio signals... |
| 6072875 |
Method and apparatus for secure identification of a mobile user in a communication network |
| Jun-6-2000 |
A method and an apparatus are provided for securely identifying a mobile user while avoiding trackability of his/her movements, i.e. it provides a way for a secure user identification in secrecy. The gist... |
| 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... |
| 6043752 |
Integrated remote keyless entry and ignition disabling system for vehicles, using updated and interdependent cryptographic codes for security |
| Mar-28-2000 |
A remote-control unit for vehicles in which an immobilizer facility and keyless entry facility are united to enable bidirectional transmission. Further, a cost reduction is achieved by decreasing the number... |
| 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... |
| 5862225 |
Automatic resynchronization for remote keyless entry systems |
| Jan-19-1999 |
The present invention teaches a method and system for resynchronizing a remote keyless entry receiver having received a new encrypted message transmitted by the transmitter which does not match a previous... |
| 5822430 |
System for encoding encryption/decryption information into IFF challenges |
| Oct-13-1998 |
An IFF system produces a challenge in which some or all of the anti-interference pulses that are inserted between adjacent bits of an encrypted message are replaced with "information pulses" that convey... |
| 5784422 |
Apparatus and method for accurate synchronization with inbound data packets at relatively low sampling rates |
| Jul-21-1998 |
An apparatus and method for accurate synchronization with inbound audio data which packets at relatively low sampling rates. By using previously known information such as the time of arrival of the beginning... |
| 5778075 |
Methods and systems for mobile terminal assisted handover in an private radio communications network |
| Jul-7-1998 |
Mobile assisted handover of an encrypted traffic connection between linked base stations of a private radio communications network are provided in a system including a plurality of base stations and a... |
| 5778073 |
Method and device for speech encryption and decryption in voice transmission |
| Jul-7-1998 |
A digitized real voice signal is converted via complex filtering into a complex signal that is subjected to sampling rate reduction, the bandwidth of the respective complex filter corresponding to the... |
| 5774550 |
Vehicle security device with electronic use authorization coding |
| Jun-30-1998 |
The invention provides a vehicle security device with an electronic use-authorization coding arrangement for preventing unauthorized access to the vehicle. The vehicle security device utilizes digital... |
| 5768374 |
Apparatus and method for continuous scrambling while transmitting or receiving synchronization data |
| Jun-16-1998 |
An apparatus and device for continuously scrambling audio while transmitting or receiving synchronization data. When transmitting, synchronization data will be substituted for scrambled audio but the audio... |
| 5717762 |
WACS-type mobile communication with a unified frame format |
| Feb-10-1998 |
In a mobile communication system of the WACS type, frame formats are unified for DSL, HDSL, and DS1 channels. In addition, each novel base station (25) comprises a radio frame number processor for adding,... |
| 5699430 |
Method and apparatus for electronically preventing unauthorized access to equipment |
| Dec-16-1997 |
An electronic security method and apparatus prevents unauthorized access to a security device, communications equipment or other equipment by generating a data coded signal between an encoding device couple... |
