| 5974140 |
Information carrier and recording and/or reproducing apparatus and/or initializing apparatus |
| Oct-26-1999 |
ID codes are given individually to each reproducing apparatus. An information carrier has a subsidiary storing area for recording reproduction-management-information (RMI) and ID codes can be registered... |
| 5953415 |
Fingerprinting plain text information |
| Sep-14-1999 |
A system for enhancing security of electronic documents distribution wherein electronic documents are fingerprinted with one or more modifications to the document text. The text modifications may be selected... |
| 5943422 |
Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels |
| Aug-24-1999 |
Electronic steganographic techniques can be used to encode a rights management control signal onto an information signal carried over an insecure communications channel. Steganographic techniques ensure... |
| 5943423 |
Smart token system for secure electronic transactions and identification |
| Aug-24-1999 |
Smart token technology, using a smart card, PCMCIA card or any other medium containing storage or processing capability is used to facilitate a variety of secure business transactions, including those... |
| 5940505 |
Information recording method and apparatus, function recording method and apparatus, and information reproducing method and apparatus |
| Aug-17-1999 |
A record signal corresponding to record information to be recorded to a record medium is scrambled, and the scrambled record signal is recorded to the record medium. The information recording method is... |
| 5940135 |
Apparatus and method for encoding and decoding information in analog signals |
| Aug-17-1999 |
Apparatus and methods are provided for encoding, storing and decoding auxiliary information on an analog source signal in a way which has minimal impact on the human perception of the source information... |
| 5930215 |
CD-Rom with machine-readable I.D. code |
| Jul-27-1999 |
A machine-readable serial number is formed on a CD-ROM by using a laser to selectively remove a reflective layer from the CD-ROM. Removal of the reflective layer creates defects in addressable information... |
| 5920878 |
Method for hiding a binary encoded message in an electronic document by modulating the case of the characters in a case-insensitive markup language |
| Jul-6-1999 |
Embodiments of the present invention are capable of hiding a message, such as, for example, a copyright notice or other indicium of authorship, in an electronic document. An illustrative embodiment of... |
| 5889919 |
Copy protect recording and playback system that enables single authorized recording of protected broadcasts be made |
| Mar-30-1999 |
A recording system that enables single authorized recordings of protected broadcasts be made. Subsequent unauthorized copies are prohibited by encoding a signal that causes the broadcast to be obscured... |
| 5889860 |
Encryption system with transaction coded decryption key |
| Mar-30-1999 |
The encryption secured computer system (10) includes a server (12) that communicates with clients (14-20) across a public network (21) using a novel transaction coded decryption key technology that discourages... |
| 5862217 |
Method and apparatus for in-camera encryption |
| Jan-19-1999 |
A digital camera method and apparatus providing encryption of an image during the acquisition process, and therefore avoiding any stage wherein unencrypted image data exists. An encrypted password is generated.... |
| 5862218 |
Method and apparatus for in-camera image marking and authentication |
| Jan-19-1999 |
A camera with a built in microprocessor system programmed to receive an input password and indicium from a host computer. The camera is configured to use the indicium in combination with a conversion formula... |
| 5850346 |
System for embedding hidden source information in three-dimensional computer model data |
| Dec-15-1998 |
In the subject invention, source information indicating an author, designer r other source of a three-dimensional computer model is embedded in the low-order digits or bits of floating point values representing... |
| 5848155 |
Spread spectrum watermark for embedded signalling |
| Dec-8-1998 |
A watermark is embedded into audio/video/image/multimedia data using spread spectrum methodology. The watermark is extracted from watermarked data without the use of an original or unwatermarked version... |
| 5812663 |
Data reproducing device |
| Sep-22-1998 |
In a system for reproducing multimedia data such as enciphered characters, enciphered images, enciphered animation or enciphered sound, an ID is given every time the data are integrated to some extent... |
| 5809139 |
Watermarking method and apparatus for compressed digital video |
| Sep-15-1998 |
A digital watermarking method and apparatus allows for the watermarking of a digital video signal in a compressed form, thereby allowing watermarking of a pre-compressed video sequence without requiring... |
| 5805699 |
Software copying system |
| Sep-8-1998 |
A software copying system which enables copyrighted software recorded in a master storage medium to be copied to a user's target storage medium in a legitimate manner. A contents identifier reading unit... |
| 5745569 |
Method for stega-cipher protection of computer code |
| Apr-28-1998 |
A method for protecting computer code copyrights by encoding the code into a data resource with a digital watermark. The digital watermark contains licensing information interwoven with essential code... |
| 5719943 |
Digital information signal transmitting/receiving method and system |
| Feb-17-1998 |
A digital information signal transmitting/receiving method and system having a transmitter for transmitting an encrypted digital information signal and a plurality of receivers for receiving the encrypted... |
| 5715313 |
Magnetic recording/reproducing method |
| Feb-3-1998 |
Information is recorded on a floppy disk in a state in which the confidentiality of the information is maintained. An ID signal representing ID information is magnetically recorded down to the lower layer... |
| 5699427 |
Method to deter document and intellectual property piracy through individualization |
| Dec-16-1997 |
A system for identifying the authorized receiver of any particular copy of a document. More specifically, each particular copy of a document is fingerprinted by applying a set of variations to a document,... |
| 5664018 |
Watermarking process resilient to collusion attacks |
| Sep-2-1997 |
A watermarking procedure wherein each of a set of copies of the work has a slightly-modified form of a "baseline" watermark that is placed within a critical region of the data. The slight variations in... |
| 5659613 |
Method and apparatus for copy protection for various recording media using a video finger print |
| Aug-19-1997 |
A method and apparatus for copyright protection for various recording media such as Digital Video Discs (DVDs) uses a combination of a Video Finger Print Signal and an Authenticating Signature to permit... |
| 5649013 |
Royalty tracking method and apparatus |
| Jul-15-1997 |
A system that facilitates tracking of computer files that have been received from on-line information services, such as CompuServe. Tracking is accomplished by adding a "handling list" to each file as... |
| 5629770 |
Document copying deterrent method using line and word shift techniques |
| May-13-1997 |
A method is provided that deters the illicit copying of electronically published documents. It includes publishing a plurality of copies of electronically created material to be distributed to a plurality... |
| 5619571 |
Method for securely storing electronic records |
| Apr-8-1997 |
An improved method of storing or retrieving electronic records. An image identification code and time data provided by a trusted source, as well as a password, are combined to generate a key. The image... |
| 5572589 |
Disc serialization |
| Nov-5-1996 |
Several approaches to serializing a disc may be used in the present invention. First, portions of a disc (such as sector(s) or track(s)) may be physically damaged to create a pattern of damage that somewhat... |
| 5568551 |
Data management method and system thereof |
| Oct-22-1996 |
To enable management by a center of data transferred to a user terminal from the center, an ISDN, which has a call connecting means which forms a signal channel before forming a data channel between a... |
| 5568550 |
Method and system for identifying documents generated by an unauthorized software copy |
| Oct-22-1996 |
Each copy of software is assigned a unique identifying code pattern which is printed on all documents produced with that software by a high resolution printer. The unique identifying code pattern is a... |
| 5559884 |
Method and system for generating and auditing a signature for a computer program |
| Sep-24-1996 |
A method and system for generating and auditing a signature for executable modules are provided. A signature is a means that uniquely identifies an authorized copy of the executable module. The signature... |
| 5546462 |
Method and apparatus for fingerprinting and authenticating various magnetic media |
| Aug-13-1996 |
A method and apparatus is disclosed for determining the remanent noise in a magnetic medium by, for example, DC saturation of a region thereof and measurement of the remaining DC magnetization. A conventional... |
| 5450489 |
System and method for authenticating software carriers |
| Sep-12-1995 |
A disk player that will play only authorized disks. Predetermined data blocks, including those in the lead-in section of the disk which contain content-related data, are processed to derive an authorization... |
| 5418853 |
Apparatus and method for preventing unauthorized copying of video signals |
| May-23-1995 |
In a digital video tape recorder (VTR) which reproduces digital video and audio signals from a magnetic tape, a copy protect bit in the reproduced digital video signal is detected, and on the basis of... |
| 5394274 |
Anti-copy system utilizing audible and inaudible protection signals |
| Feb-28-1995 |
A system for preventing the unauthorized copying of audio or video recording by (1) processing the recorded material so as to identify the protected material in a manner that does not audibly distort the... |
| 5379345 |
Method and apparatus for the processing of encoded data in conjunction with an audio broadcast |
| Jan-3-1995 |
A method and apparatus for the identification and verification of audio transmission segments, such as may be broadcast by a radio station, consists of the generation of a data stream corresponding in... |
| 5371792 |
CD-ROM disk and security check method for the same |
| Dec-6-1994 |
A CD-ROM disk comprises an identifier region having a disk identifier recorded in and a security code region having a security code recorded in. The identifier region and the security code region are provided... |
| 5365586 |
Method and apparatus for fingerprinting magnetic media |
| Nov-15-1994 |
A method and apparatus is disclosed for determining the remanent noise in a magnetic medium by DC saturation of a region thereof and measurement of the remaining DC magnetization. A conventional magnetic... |
| 5287407 |
Computer software protection |
| Feb-15-1994 |
A master copy of a software file has within it a predetermined block of data. When a copy of the file is made that block of data within the copied file is located and overwritten with data identifying... |
| 5212728 |
Dynamic trace elements |
| May-18-1993 |
The present invention relates to a dynamic hardware tracer for use in a circuit. The circuit is comprised of real circuitry which performs a real function and the tracer. The tracer is comprised of functional... |
| 5172413 |
Secure hierarchial video delivery system and method |
| Dec-15-1992 |
Disclosed is an improved system for the delivery of entertainment and educational programming from a plurality of electronic libraries to a plurality of users. Users actuate a hand operated control device... |
| 5046090 |
Recorded medium for video control system |
| Sep-3-1991 |
A video recording medium storing a video program includes a series of television fields including a first field containing both a random digital code encrypted according to a code encryption key and program... |
| 4972471 |
Encoding system |
| Nov-20-1990 |
The method of encoding a given recorded signal made up of a host of different frequencies comprises modifying the recorded signal to selectively alter in a known manner a portion of the recorded signal... |
| 4890319 |
Method for controlling copying of protected information transmitted over a communications link |
| Dec-26-1989 |
A subscription television system for distributing program material protected by copyright to subscribers comprises a transmitter including a data insertion circuit for inserting a control bit in a transmitted... |
| 4837737 |
System for detecting origin of proprietary documents generated by an apparatus for processing information such as words, figures and pictures |
| Jun-6-1989 |
A word processor includes a work station having a keyboard and a display device, a main unit for forming a text file in accordance with input commands entered by the keyboard, an external memory unit for... |
| 4811325 |
High-speed reproduction facility for audio programs |
| Mar-7-1989 |
Data processing system for high-speed reproduction of musical recordings at a point-of-sale terminal utilizes optical CD music ROM banks of master programs prerecorded by a Dolby ADM (adaptive delta modulated)... |
| 4785361 |
Method and apparatus for frustrating the unauthorized copying of recorded data |
| Nov-15-1988 |
Authorized disks made in accordance with the invention are physically distinguishable from the blank disks which would be used for making unauthorized copies. A security check procedure is included in... |
| 4644493 |
Implementing a shared higher level of privilege on personal computers for copy protection of software |
| Feb-17-1987 |
Method and apparatus which restricts software, distributed on magnetic media, to use on a single computing machine. The original medium is functionally uncopyable, until it is modified by the execution... |
| 4528588 |
Method and apparatus for marking the information content of an information carrying signal |
| Jul-9-1985 |
An information signal (INF) which is transmitted in coded form (CINF) from a signal source (RC) to a signal receiver (4,5) is decoded at the receiver and at the same time marked (MINF) by the introduction... |
| 4086634 |
Method and apparatus for preparing recorded program material to prevent unauthorized duplication by magnetic tape recording |
| Apr-25-1978 |
Unauthorized duplication of recorded audible program material upon magnetic tape, commonly known as tape piracy, is prevented and rendered detectable by the present method and apparatus for preparing the... |
| 4040099 |
Method and apparatus for preparing recorded program material to render detectable unauthorized magnetic tape duplications, and method and apparatus for detecting such duplications |
| Aug-2-1977 |
Unauthorized duplication of recorded program material upon magnetic tape, commonly known as tape piracy, is rendered detectable by the present method and apparatus for preparing the program material. The... |
