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7613296 |
M6 block cipher system and method for encoding content and authenticating a device
An M 6 block cipher system and method for encoding content and authenticating a device may use an M 6 core. The M 6 block cipher system may include a rotate constant selector selecting one or...
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7606388 |
Contents border detection apparatus, monitoring method, and contents location detection method and program and storage medium therefor
A contents border detection apparatus and monitoring method. The apparatus comprises a digital watermark detector for detecting a digital watermark embedded in contents for which a time element is...
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7599927 |
Method for searching content particularly for extracts common to two computer files
The present invention relates to searching content, particularly for at least one extract common to a first data file and a second data file. The method comprises a preliminary step of preparing at...
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7482946 |
Method and apparatus for camouflaging business-activity information in a telemetry signal
One embodiment of the present invention provides a system that camouflages business-activity information in telemetry signals from a computer system. During operation, the system monitors telemetry...
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7482947 |
Camouflaging business-activity information in a telemetry signal through randomization
One embodiment of the present invention provides a system that camouflages business-activity information in telemetry signals from a computer system. During operation, the system monitors telemetry...
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7317796 |
System and method for video stream encryption
A system and method of video stream encryption. A storage device stores a first quantization scale and a second quantization scale. An encryption application receives video data, a first...
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7003118 |
High performance IPSEC hardware accelerator for packet classification
An architecture for a high performance IPSEC accelerator. The architecture includes components for scanning fields of packets, programming an IPSEC services device according to the scanned fields,...
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6901514 |
Secure oblivious watermarking using key-dependent mapping functions
A method for embedding a watermark into content is disclosed. The content contains content samples. The method including the steps of: receiving the content, creating a continuous watermark...
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6889324 |
Digital measurement apparatus and image measurement apparatus
A digital measurement apparatus measures a physical measurement object, provides a digital signature of public-key cryptography to measured data of a thus-measured physical quantity, and manages...
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5832057 |
Lockout device for preventing telephone eavesdropping from an extension device, and method
Remote telephone coder 10R and local telephone coder 10L provide coding and decoding for voice communication between remote telephone set 11R and local telephone set 11L through telephone line 12....
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5613001 |
Digital signature verification technology for smart credit card and internet applications
The presently used Asymmetric Digital Signature verification technologies, such as the system of RSA Data Security Corp., require complex mathematical operations for encryption and decryption. As a...
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5422919 |
EMI suppression coding
EMI suppression technique that pseudorandomizes the positive or negative going transitions that are used to represent one binary state in a transmitted digital signal such as in MLT-3 data format....
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5319708 |
System for the simultaneous coding of a number of television signals and for decoding thereof in radiofrequency
A system for the simultaneous coding of a number of television signals and for decoding thereof in radiofrequency. The radiofrequency TV signal or signals to be distributed undergo remodulation on...
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5165098 |
System for protecting digital equipment against remote access
System for protection against remote access to digital equipment (1) emitting stray electromagnetic radiation (2) and operating with digital signals under clock control and being based on the...
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5029210 |
Cooperative communication system
A cooperating communications system in which at least two stations and a connecting communications link form a cooperative communicating loop. Each station contains a plurality of amplification...
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4932057 |
Parallel transmission to mask data radiation
Aircraft often include a central memory which distributes data to a number of communication, navigational and other utilization devices. In order to achieve a high degree of security for data...
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4737990 |
Unauthorized channel jamming signal applying method for CATV system
In a jamming signal applying device connected between a cable and subscribers' terminal units in a CATV system, a signal for scrambling the video signal is produced in a time sharing mode, with the...
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4644396 |
Gate circuit for central control of CATV system
A gate circuit for use in switching an interference signal in a CATV system whereby the output impedance of the gate circuit is constant, independent of the switching state of the gate circuit. The...
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4636852 |
Scrambling and descrambling of television signals for subscription TV
A scrambled TV signal is provided by adding thereto a signal having an amplitude which changes pseudorandomly in successive increments of time, the duration of each of which is much less than the...
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4361729 |
Narrowband analog message privacy system
A privacy system in which an analog information-bearing signal is linearly combined with a noiselike coding waveform to produce a composite waveform of unrecognizable, scrambled signal for...
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4208545 |
Secrecy system
1. In a system of secret telegraph communication, an incoming channel over which miscellaneous matter intelligence signals are periodically received, an outgoing channel susceptible of operating at...
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4188580 |
Secure communication system
A secure communication system for transmitting and receiving an encoded information signal. The system generates at transmitting and receiving locations a predetermined unique pseudorandom code. A...
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3497623 |
SECURE PERSONAL CONVERSATION USING TIME BLANKED NOISE GENERATOR
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3427399 |
METHOD OF AND APPARATUS FOR ENCODING AND DECODING CLEAR SIGNAL PULSE SEQUENCES
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3399273 |
Ciphering system
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3373245 |
Production of current of random variation
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3133991 |
Method and apparatus for masking communication signals
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2836657 |
Secrecy communication system
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