| Patents for H04K 1 - Secret communication (16,771) |
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| 09/16/2004 | US20040179631 UWB receiver architecture |
| 09/16/2004 | US20040179583 Method and apparatus for decoder input scaling based on interference estimation in CDMA |
| 09/16/2004 | CA2516427A1 Cost-effective multi-channel quadrature amplitude modulation |
| 09/15/2004 | EP1458211A1 Radio communication device |
| 09/15/2004 | CN2641949Y Encrypted data transmitting and receiving device |
| 09/15/2004 | CN1167230C Communication system, communicaton control apparatus and method |
| 09/15/2004 | CN1167223C Method for safety communication in multiple access system |
| 09/14/2004 | US6792112 Encrypting communications between wireless mobile units |
| 09/09/2004 | US20040177254 Universal registration system |
| 09/09/2004 | US20040177251 Image data encryption method, image data transform method, apparatus for the methods, computer program, and computer-readable storage medium |
| 09/09/2004 | US20040174999 Image data encryption method and apparatus, computer program, and computer-readable storage medium |
| 09/09/2004 | US20040174994 Time based encryption algorithm |
| 09/02/2004 | US20040170280 Systems, methods and computer program products for encryption and decryption using wavelet transforms |
| 09/01/2004 | EP1451961A2 Methods and systems for establishing trust of identity |
| 09/01/2004 | EP1451955A2 Method and apparatus for providing multiple spread spectrum clock generator circuits with overlapping output frequencies |
| 09/01/2004 | CN2638340Y Cipher code controller with reset device |
| 08/31/2004 | US6785813 Key agreement and transport protocol with implicit signatures |
| 08/25/2004 | EP1449175A2 Using real random number generator as proof of time |
| 08/25/2004 | EP1104578A4 Universal memory element with systems employing same and apparatus and method for reading, writing and programming same |
| 08/25/2004 | CN1524206A External locking mechanism for personal computer memory locations |
| 08/25/2004 | CN1523805A Equipment, system and method for implementing encryption communication between heterogeneity network |
| 08/24/2004 | US6782102 Multiple format secure voice apparatus for communication handsets |
| 08/24/2004 | US6782101 Encryption using fractal key |
| 08/19/2004 | WO2004070979A2 Ofdm communication device |
| 08/19/2004 | WO2004059976A3 Method and system for securing scrambled data |
| 08/19/2004 | US20040161047 Apparatus and method for carrier frequency offset and phase compensation in communication system |
| 08/19/2004 | US20040161046 Acquisition and adjustment of gain, receiver clock frequency, and symbol timing in an OFDM radio receiver |
| 08/19/2004 | US20040160906 Multicarrier transmission system with low power sleep mode and rapid-on capability |
| 08/18/2004 | EP1447976A1 Method of controlling descrambling of a plurality of program transport streams, receiver system and portable secure device |
| 08/18/2004 | EP1156694B1 Radio communication device |
| 08/18/2004 | EP0891661B1 Method and apparatus for data protection allowing for multiple encryption levels applicable on a data element type level |
| 08/18/2004 | CN2634733Y Anti-jamming filter for short wave channel secrete communication |
| 08/18/2004 | CN1522072A Method of controlling descrambling of a plurality of program transport streams, receiver system and portable secure device |
| 08/12/2004 | US20040158724 Digital watermarking for identification documents |
| 08/12/2004 | US20040158722 Set top box object security system |
| 08/12/2004 | CA2455378A1 Method of controlling descrambling of a plurality of program transport streams, receiver system and portable secure device |
| 08/11/2004 | EP1445884A1 Transmission method, transmission apparatus, and reception apparatus |
| 08/11/2004 | EP1445883A1 Reception apparatus |
| 08/11/2004 | EP1445874A1 Communication method and radio communication apparatus |
| 08/11/2004 | EP1444857A1 Encrypting a pseudo-noise (pn) sequence before spreading a communication signal |
| 08/11/2004 | EP1444798A1 Array processing for linear system solutions |
| 08/11/2004 | EP1388232A4 Encryption/decryption engine for multiple data streams |
| 08/11/2004 | EP0846375B2 Process and device for the scalable coding of audio signals |
| 08/11/2004 | CN1520537A Mechanism for closing back door access mechanisms in personal computer |
| 08/10/2004 | US6775781 Administrative security systems and methods |
| 08/05/2004 | WO2004032418A3 Secure audio stream scrambling system |
| 08/05/2004 | US20040153416 Method for managing license of software program in storage system |
| 08/05/2004 | US20040153414 Managing an electronic seal of certification |
| 08/05/2004 | US20040151316 Apparatus and method for embedding and extracting information in analog signals using distributed signal features and replica modulation |
| 08/05/2004 | US20040151311 Encrypted photo archive |
| 08/04/2004 | CN1518261A Constant frame coding double quadrature modulation and demodulation device |
| 08/04/2004 | CN1160888C Device for generating plurality of code series simultaneously and CDMA radio receiver comprising the device |
| 08/04/2004 | CN1160632C Method and apparatus for processing digitally encoded audio data |
| 08/03/2004 | US6772157 Delegated administration of information in a database directory |
| 08/03/2004 | US6771796 Methods for identifying equipment used in counterfeiting |
| 07/29/2004 | WO2004064315A1 System and method for optical communication having anonymity |
| 07/29/2004 | US20040146161 Superposition of data over voice |
| 07/29/2004 | US20040146116 Apparatus for constant amplitude coded bi-orthogonal demodulation |
| 07/28/2004 | CN2629348Y Apparatus for obtaining single-photon output according to output port photon number distribution |
| 07/28/2004 | CN1516943A Method and apparatus for ultra-wideband (UWB) radio utilizing MEMS filtering for echo cancellation |
| 07/27/2004 | US6768808 Encoding and decoding methods in which decryption data is conveyed steganographically within audio or visual content |
| 07/22/2004 | WO2004047313A3 Methods and systems acquiring impulse signals |
| 07/22/2004 | US20040141613 Information processing method and apparatus, and computer program and computer-readable storage medium |
| 07/22/2004 | US20040141612 Code-string encryption method and apparatus, decryption method and apparatus, and recording medium |
| 07/21/2004 | EP1277301B1 Method for transmitting payment information between a terminal and a third equipement |
| 07/21/2004 | CN1515092A Receiver |
| 07/21/2004 | CN1515088A Communication method and radio communication apparatus |
| 07/21/2004 | CN1158811C Sub-scrambling/descrambling method and sub-scrambling/descrambling device |
| 07/20/2004 | US6766454 System and method for using an authentication applet to identify and authenticate a user in a computer network |
| 07/15/2004 | WO2004059976A2 Method and system for securing scrambled data |
| 07/15/2004 | WO2004059449A1 Method and system for testing a program, and a device |
| 07/15/2004 | US20040139031 Systems and methods for providing an interactive trading application |
| 07/15/2004 | US20040139022 Content states in a media network environment |
| 07/15/2004 | US20040137954 Visualization supplemented wireless mobile telephony-audio |
| 07/15/2004 | US20040136448 Method and apparatus for signal transmission and reception |
| 07/15/2004 | US20040136439 Methods and systems acquiring impulse signals |
| 07/14/2004 | EP1436754A1 System and method for specifying and processing legality expressions |
| 07/14/2004 | CN1512799A Method for realizing remote cipher key destruction for secret mobile phone |
| 07/14/2004 | CN1512701A Telephone enciphering box |
| 07/14/2004 | CN1512700A Seamless key exchanging technology based on secret communication |
| 07/08/2004 | US20040133785 Content utilizing method |
| 07/08/2004 | US20040133548 Electronic Files Digital Rights Management. |
| 07/08/2004 | US20040131186 Encrypting apparatus |
| 07/07/2004 | EP1342333B1 Partial encryption of assembled bitstreams |
| 07/07/2004 | EP1275074A4 Method and system for automatically publishing content |
| 07/07/2004 | CN1510681A Duplicating protective system and method for digital signal |
| 07/07/2004 | CN1510680A Duplicating protective system and method for digital signal |
| 07/07/2004 | CN1510679A Duplicating protective system and method for digital signal |
| 07/01/2004 | WO2004056034A1 System and method for limiting access to data |
| 07/01/2004 | WO2004055757A1 Key synchronization in a visual cryptographic system |
| 07/01/2004 | WO2004055756A1 Tamper-resistant elliptical curve encryption using secret key |
| 07/01/2004 | WO2003079156A3 System and method for graphical rights expressions |
| 07/01/2004 | US20040125958 Headphone for wireless use with authentication/encryption |
| 07/01/2004 | US20040125955 Communication systems |
| 07/01/2004 | US20040125952 Digital watermarking of low bit rate video |
| 07/01/2004 | DE19549621B4 Vorrichtung zum Codieren von Audiosignalen An apparatus for encoding audio signals |
| 07/01/2004 | CA2503660A1 System and method for limiting access to data |
| 06/30/2004 | CN1509097A Method for conducting safe far-end electronic signing and checking through mobile telephone |
| 06/30/2004 | CN1508998A Time-sharing gap encrypting-diencrypting technology suitable for group path channels |
| 06/30/2004 | CN1156101C Single-photon router operation apparatus |