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Your search returned 168 patents.
( 705/56 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 6868404 | DIGITAL DATA RECORDING DEVICE, DIGITAL DATA MEMORY DEVICE, AND DIGITAL DATA UTILIZING DEVICE FOR CONVERTING MANAGEMENT INFORMATION WHICH CONTAINS RESTRICTIVE INFORMATION USING A DIFFERENT KEY IN EACH MANAGEMENT INFORMATION SEND/RECEIVE SESSION
| June 9, 2000 |
| 6868403 | Secure online music distribution system
| March 9, 2000 |
| 6865552 | Data copying system, data copying apparatus, data copying method, and recording medium
| December 1, 1999 |
| 6850915 | Method for controlling distribution and use of software products with net-work-connected computers
| June 8, 2000 |
| 6847948 | Method and apparatus for secure distribution of software/data
| December 20, 1999 |
| 6842741 | Recording medium with electronic ticket definitions recorded thereon and electronic ticket processing methods and apparatuses
| August 12, 1999 |
| 6839434 | Method and apparatus for performing a key update using bidirectional validation
| July 28, 1999 |
| 6834269 | Factory-installed software purchase verification key
| February 23, 2000 |
| 6826546 | Method and system for licensing a copy of a copyright protected work
| October 26, 2000 |
| 6820063 | Controlling access to content based on certificates and access predicates
| January 8, 1999 |
| 6813709 | Method and apparatus for recorded digital data protection via media volume
| March 24, 2000 |
| 6772340 | Digital rights management system operating on computing device and having black box tied to computing device
| March 15, 2000 |
| 6757391 | OPTICAL DISK, AN OPTICAL DISK BARCODE FORMING METHOD, AN OPTICAL DISK REPRODUCTION APPARATUS, A MARKING FORMING APPARATUS, A METHOD OF FORMING A LASER MARKING ON A OPTICAL DISK, AND A METHOD OF MANUFACTURING AN OPTICAL DISK
| February 20, 2002 |
| 6748366 | System for protecting anonymity of parties involved in a person-to-person electronic commerce transaction
| January 11, 2000 |
| 6725205 | System and method for secure software installation
| December 2, 1999 |
| 6721889 | Device for protecting an electronic apparatus
| July 14, 1999 |
| 6707564 | Image forming apparatus
| January 19, 2000 |
| 6697944 | Digital content distribution, transmission and protection system and method, and portable device for use therewith
| October 1, 1999 |
| 6622132 | Device for encoding encrypted information on an optical disk
| November 30, 1999 |
| 6611820 | Recording medium, recorder, reproducer, cryptocommunication system and program license system
| December 30, 1999 |
| 6594646 | Method and apparatus for selling digital contents, processing program thereof and recording medium for the program
| December 28, 1999 |
| 6571339 | Use of a processor identification for authentication
| December 30, 1998 |
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