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Class Information
Number: 380/287
Name: Cryptography > Electric signal modification
Description: Subject matter which makes an information signal unintelligible by varying a parameter of the signal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7587589 |
Saving and retrieving data based on symmetric key encryption |
Sep. 8, 2009 |
| 7578001 |
Information recording and reproducing apparatus, information recording and reproducing method and information recording and reproducing program |
Aug. 18, 2009 |
| 7564973 |
Digital watermark embedding device and digital watermark embedding method |
Jul. 21, 2009 |
| 7555787 |
IC intrusion detection |
Jun. 30, 2009 |
| 7525202 |
Quantum computational systems |
Apr. 28, 2009 |
| 7502471 |
System and method for protecting data streams in hardware components |
Mar. 10, 2009 |
| 7471806 |
Method, apparatus and computer program for inserting a watermarking program into an image processing program |
Dec. 30, 2008 |
| 7463736 |
Data process apparatus and method therefor |
Dec. 9, 2008 |
| 7401228 |
Method for transmitting data, apparatus for recording data, medium for recording data, and apparatus for reproducing data |
Jul. 15, 2008 |
| 7391866 |
Broadcast apparatus and reception apparatus for providing a storage service by which scrambled content is stored and descrambled using scrambling key list |
Jun. 24, 2008 |
| 7380124 |
Security transmission protocol for a mobility IP network |
May. 27, 2008 |
| 7362860 |
Image data encryption method, image data transform method, apparatus for the methods, computer program, and computer-readable storage medium |
Apr. 22, 2008 |
| 7356142 |
Secure compact disk and player |
Apr. 8, 2008 |
| 7352861 |
Digital electronic component which is protected against electrical-type analyses |
Apr. 1, 2008 |
| 7305089 |
Picture taking apparatus and method of controlling same |
Dec. 4, 2007 |
| 7302060 |
Method and application for authentication of a wireless communication using an expiration marker |
Nov. 27, 2007 |
| 7274790 |
Scrambling and descrambling a high definition TV signal |
Sep. 25, 2007 |
| 7242217 |
Output reporting techniques for hard intellectual property blocks |
Jul. 10, 2007 |
| 7127620 |
Power analysis resistant coding device |
Oct. 24, 2006 |
| 7099492 |
Method of steganographically embedding geo-location data in media |
Aug. 29, 2006 |
| 7069590 |
System and method for protecting data streams in hardware components |
Jun. 27, 2006 |
| 7039614 |
Method for simulcrypting scrambled data to a plurality of conditional access devices |
May. 2, 2006 |
| 7003118 |
High performance IPSEC hardware accelerator for packet classification |
Feb. 21, 2006 |
| 7000106 |
Methods and apparatus for kernel mode encryption of computer telephony |
Feb. 14, 2006 |
| 6965682 |
Data transmission by watermark proxy |
Nov. 15, 2005 |
| 6954542 |
Image processing apparatus and method |
Oct. 11, 2005 |
| 6950520 |
Method and apparatus for carrying data in a video signal so that the data is not recorded |
Sep. 27, 2005 |
| 6873975 |
Content usage control system, content usage apparatus, computer readable recording medium with program recorded for computer to execute usage method |
Mar. 29, 2005 |
| 6842522 |
Secure digital video disk and player |
Jan. 11, 2005 |
| 6836548 |
Communications security and trusted path method and means |
Dec. 28, 2004 |
| 6792110 |
Apparatus and method for enhancing the security of negotiable instruments |
Sep. 14, 2004 |
| 6742123 |
Apparatus and methods for preventing denial of service attacks |
May. 25, 2004 |
| 6724913 |
Digital watermarking |
Apr. 20, 2004 |
| 6628802 |
Marking and determining distortion in an image |
Sep. 30, 2003 |
| 6601172 |
Transmitting revisions with digital signatures |
Jul. 29, 2003 |
| 6542609 |
Method and apparatus for scrambling a high definition television signal |
Apr. 1, 2003 |
| RE38044 |
Method for deterring forgeries and authenticating signatures |
Mar. 25, 2003 |
| 6516064 |
Signal recording apparatus, signal record medium and signal reproducing apparatus |
Feb. 4, 2003 |
| 6493457 |
Electronic watermarking in the compressed domain utilizing perceptual coding |
Dec. 10, 2002 |
| 6404898 |
Method and system for encoding image and audio content |
Jun. 11, 2002 |
| 6359999 |
Method of adding information to video signal and information adding device |
Mar. 19, 2002 |
| 6314409 |
System for controlling access and distribution of digital property |
Nov. 6, 2001 |
| 6292569 |
Systems and methods using cryptography to protect secure computing environments |
Sep. 18, 2001 |
| 6275939 |
System and method for securely accessing a database from a remote location |
Aug. 14, 2001 |
| 6260143 |
Host-based caching method and system for copy protected content |
Jul. 10, 2001 |
| 6253027 |
System, method and article of manufacture for exchanging software and configuration data over a multichannel, extensible, flexible architecture |
Jun. 26, 2001 |
| 6240186 |
Simultaneous bi-directional translation and sending of EDI service order data |
May. 29, 2001 |
| 6223286 |
Multicast message transmission device and message receiving protocol device for realizing fair message delivery time for multicast message |
Apr. 24, 2001 |
| 6212636 |
Method for establishing trust in a computer network via association |
Apr. 3, 2001 |
| 6208738 |
Interface between two proprietary computer programs |
Mar. 27, 2001 |
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