| Patents for H04K 1 - Secret communication (16,771) |
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| 10/02/2001 | CA2234078C Method of and apparatus for coding audio signals |
| 09/27/2001 | US20010024963 Communication apparatus, frequency spectrum inversion method and program storage medium |
| 09/27/2001 | DE10012875A1 Mobile radio receiver digital data signal processing device |
| 09/26/2001 | EP1137220A2 Key agreement method in secure communication system using multiple access method. |
| 09/26/2001 | EP1137214A2 Encryption and transmission apparatus, decryption and reception apparatus, transmission method, reception method and recording medium |
| 09/20/2001 | US20010023484 Transmission apparatus, reception apparatus, transmission method, reception method and recording medium |
| 09/19/2001 | EP1134906A2 Communication apparatus , frequency spectrum inversion method and program storage medium |
| 09/19/2001 | EP0916209B1 Cryptographic key recovery system |
| 09/19/2001 | CN1313687A Transmitting part and method, receiving part and method, and recording medium |
| 09/13/2001 | US20010021252 Encryption and authentication methods and apparatus for securing telephone communications |
| 09/12/2001 | EP1133144A2 Image forming apparatus and image reading device for use in the apparatus |
| 09/11/2001 | US6289108 Methods for detecting alteration of audio and images |
| 09/06/2001 | US20010019428 Image forming apparatus and image reading device for use in the apparatus |
| 09/05/2001 | EP1130917A2 Copyright protected signal transmission apparatus and signal transmission method |
| 09/05/2001 | CN1311582A Signalling device and signalling method |
| 09/04/2001 | US6285776 Methods for identifying equipment used in counterfeiting |
| 08/30/2001 | US20010018741 Method and apparatus for performing data encryption and error code correction |
| 08/29/2001 | EP1127425A1 Apparatus and methods for cryptographic synchronization in packet based communications |
| 08/29/2001 | EP1127421A1 Encryption and authentication methods and apparatus for securing telephone communications |
| 08/28/2001 | CA2226716C Decryption of retransmitted data in an encrypted communication system |
| 08/23/2001 | WO2001061976A1 Method and device for monitoring technically transmitted telephone conversations |
| 08/23/2001 | WO2001061904A1 System and method for protecting data streams in hardware components |
| 08/23/2001 | US20010016837 Method for computer network operation providing basis for usage fees |
| 08/23/2001 | US20010016052 Method for encoding bits in a signal |
| 08/23/2001 | US20010016043 Radio data transmission apparatus |
| 08/23/2001 | US20010015997 Packet spread-spectrum receiver |
| 08/23/2001 | US20010015996 Packet spread-spectrum transmitter |
| 08/22/2001 | EP1126643A2 A method and receiver for accessing data carried by a broadcast signal |
| 08/22/2001 | CN1309513A Content data conversion arrangement and method, recording medium for memory of content data conversion program |
| 08/21/2001 | US6278781 Wireless telephony with steganography |
| 08/16/2001 | WO2001059962A1 Integrated beamforming/rake/mud cdma receiver architecture |
| 08/16/2001 | US20010014944 Data communication device |
| 08/15/2001 | CN1308426A Audio data broadcasting method and the system providing the data to broadcast emitter |
| 08/15/2001 | CN1308425A Audio Data transmitting method and audio data broadcast tranmitting system |
| 08/14/2001 | US6275679 Secure communication using array transmitter |
| 08/14/2001 | US6275573 System and method for secured network access |
| 08/09/2001 | US20010012377 Steganographically encoding a first image in accordance with a second image |
| 08/09/2001 | DE10014463A1 Verfahren und Schaltungsanordnung zur sicheren Übertragung in Digitalübertragungssystemen Method and circuit arrangement for secure transmission in digital communication systems |
| 08/07/2001 | US6271946 Optical layer survivability and security system using optical label switching and high-speed optical header generation and detection |
| 08/02/2001 | US20010011349 System and method for encrypting a data session between a client and a server |
| 08/02/2001 | US20010011233 Coding system and method for linking physical items and corresponding electronic online information to the physical items |
| 08/02/2001 | US20010010730 Steganographic messaging through imagery |
| 08/01/2001 | EP1119933A1 Transmitter-receiver for data signals, system for transmitting data signals, device for assembly in a transmitter-receiver and synchronization method |
| 07/31/2001 | US6269348 Tokenless biometric electronic debit and credit transactions |
| 07/26/2001 | WO2001054343A2 Method and apparatus for achieving crypto-syncronization in a packet data communication system |
| 07/26/2001 | WO2001054341A2 A method of scrambling a signal |
| 07/26/2001 | US20010009583 Secret key registration method, secret key register, secret key issuing method, cryptographic communication method and cryptographic communication system |
| 07/26/2001 | US20010009545 Packet-switched spread-spectrum system |
| 07/25/2001 | EP1118203A1 Superposition of data over voice |
| 07/25/2001 | CN1305274A Mobile communication system |
| 07/24/2001 | US6266430 Audio or video steganography |
| 07/24/2001 | US6266418 Encryption and authentication methods and apparatus for securing telephone communications |
| 07/24/2001 | US6266412 Encrypting speech coder |
| 07/19/2001 | US20010008558 Arbitrary function generating circuit using a simple operational element and an encryption method therefor |
| 07/17/2001 | US6263087 Method of encoding bits in a signal |
| 07/17/2001 | US6263017 Method and apparatus for signal transmission and reception |
| 07/17/2001 | US6262971 Multichannel spread-spectrum packet |
| 07/05/2001 | WO2001049058A1 Radio communication device and radio communication method |
| 07/05/2001 | US20010007133 System and method for maintaining security in a distributed computer network |
| 07/05/2001 | CA2365127A1 Radio communication device and radio communication method |
| 06/28/2001 | WO2001047165A2 Method and circuit arrangement for secure digital transmission |
| 06/28/2001 | US20010005423 Steganographic system with changing operations |
| 06/28/2001 | CA2396462A1 Method and circuit arrangement for the secure transmission in digital transmission systems |
| 06/27/2001 | CN1301460A Multimedia adaptive scrambling system (MASS) |
| 06/26/2001 | US6252963 Method and system for preventing reproduction of documents |
| 06/26/2001 | US6252962 Featureless covert communication system |
| 06/26/2001 | US6252961 Method and apparatus for performing data encryption and error code correction |
| 06/20/2001 | EP1108288A1 Method of encoding bits in a signal |
| 06/20/2001 | EP0695485B1 Fair cryptosystems and methods of use |
| 06/20/2001 | CN1300428A System and method for copy protection for digital signals |
| 06/14/2001 | WO2001043367A1 Method and apparatus for implementing leaf node proxy in a network |
| 06/06/2001 | EP1104578A1 Universal memory element with systems employing same and apparatus and method for reading, writing and programming same |
| 05/23/2001 | EP1101671A1 Method and system of secured bidirectional transmission of data |
| 05/23/2001 | EP0615673B1 Method and apparatus for data encryption and transmission |
| 05/15/2001 | US6233347 System method, and product for information embedding using an ensemble of non-intersecting embedding generators |
| 05/15/2001 | US6233075 Optical layer survivability and security system |
| 05/10/2001 | WO2001033766A2 Random number generation for encrypting cellular communications |
| 05/08/2001 | US6230148 Tokenless biometric electric check transaction |
| 05/08/2001 | US6229897 Apparatus and method of secured analog voice communication |
| 05/02/2001 | EP1096714A2 Contents data conversion apparatus and method, and record medium storing contents data conversion program |
| 05/02/2001 | EP1095517A1 Multimedia adaptive scrambling system (mass) |
| 05/02/2001 | EP1095376A1 Apparatus and method for embedding and extracting information in analog signals using replica modulation |
| 05/02/2001 | CN1293845A Video profram bearing transport stream remultiplexer |
| 05/01/2001 | CA2160068C Method and apparatus for free previews of communication network services |
| 04/26/2001 | US20010000535 Tokenless biometric electronic financial transactions via a third party identicator |
| 04/25/2001 | EP1093689A1 An optical encryption and decryption method and system |
| 04/25/2001 | EP1093635A1 System, method, and product for information embedding using an ensemble of non-intersecting embedding generators |
| 04/17/2001 | US6219423 System and method for digitally signing a digital agreement between remotely located nodes |
| 04/17/2001 | US6219161 Optical layer survivability and security system |
| 04/05/2001 | WO2001003110A3 Off-site detention monitoring system |
| 04/05/2001 | CA2706056A1 Method and apparatus for encrypting transmissions in a communication system |
| 04/05/2001 | CA2706045A1 Method and apparatus for encrypting transmissions in a communication system |
| 04/05/2001 | CA2383960A1 Method and apparatus for encrypting transmissions in a communication system |
| 03/28/2001 | CN1289194A Secret communicator using danamic cipher |
| 03/21/2001 | EP1084554A2 Procedure and device for transmitting information by radio |
| 03/21/2001 | EP1084542A1 System and method for secured network access |
| 03/13/2001 | US6202056 Method for computer network operation providing basis for usage fees |
| 03/07/2001 | EP1081000A2 Security device |
| 03/07/2001 | CN1286851A Device and method for generating quasi-orthogonal code and spreading channel signals in mobile communication system |
| 03/06/2001 | USH1945 Sustaining chaos by using basin boundary saddles |