US Patent No: 7,925,898

Number of patents in Portfolio can not be more than 2000

Systems and methods using cryptography to protect secure computing environments

ALSO PUBLISHED AS: 20060248353

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Secure computation environments are protected from bogus or rogue load modules, executables and other data elements through use of digital signatures, seals and certificates issued by a verifying authority. A verifying authority—which may be a trusted independent third party—tests the load modules or other executables to verify that their corresponding specifications are accurate and complete, and then digitally signs the load module or other executable based on tamper resistance work factor classification. Secure computation environments with different tamper resistance work factors use different verification digital signature authentication techniques (e.g., different signature algorithms and/or signature verification keys)—allowing one tamper resistance work factor environment to protect itself against load modules from another, different tamper resistance work factor environment. Several dissimilar digital signature algorithms may be used to reduce vulnerability from algorithm compromise, and subsets of multiple digital signatures may be used to reduce the scope of any specific compromise.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
INTERTRUST TECHNOLOGIES CORP.SUNNYVALE, CA187

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Shear, Victor H Bethesda, MD 191 17376
Sibert, W Olin Lexington, MA 128 4822
Van, Wie David M Sunnyvale, CA 194 16243

Cited Art Landscape

Patent Info (Count) # Cites Year
 
InterTrust Technologies Corp. (63)
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6,157,721 Systems and methods using cryptography to protect secure computing environments 443 1996
5,892,900 Systems and methods for secure transaction management and electronic rights protection 1925 1996
5,910,987 Systems and methods for secure transaction management and electronic rights protection 756 1996
5,915,019 Systems and methods for secure transaction management and electronic rights protection 625 1997
5,917,912 System and methods for secure transaction management and electronic rights protection 614 1997
5,949,876 Systems and methods for secure transaction management and electronic rights protection 569 1997
5,920,861 Techniques for defining using and manipulating rights management data structures 552 1997
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2001/0042,043 CRYPTOGRAPHIC METHODS, APPARATUS AND SYSTEMS FOR STORAGE MEDIA ELECTRONIC RIGHTS MANAGEMENT IN CLOSED AND CONNECTED APPLIANCES 261 1997
5,982,891 Systems and methods for secure transaction management and electronic rights protection 837 1997
6,112,181 Systems and methods for matching, selecting, narrowcasting, and/or classifying based on rights management and/or other information 748 1997
6,668,325 Obfuscation techniques for enhancing software security 314 1998
6,253,193 Systems and methods for the secure transaction management and electronic rights protection 587 1998
6,185,683 Trusted and secure techniques, systems and methods for item delivery and execution 638 1998
6,240,185 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels 317 1999
6,138,119 Techniques for defining, using and manipulating rights management data structures 413 1999
6,363,488 Systems and methods for secure transaction management and electronic rights protection 451 1999
6,389,402 Systems and methods for secure transaction management and electronic rights protection 370 1999
6,237,786 Systems and methods for secure transaction management and electronic rights protection 376 1999
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6,427,140 Systems and methods for secure transaction management and electronic rights protection 355 1999
7,133,846 Digital certificate support system, methods and techniques for secure electronic commerce transaction and rights management 170 1999
6,658,568 Trusted infrastructure support system, methods and techniques for secure electronic commerce transaction and rights management 400 1999
7,165,174 Trusted infrastructure support systems, methods and techniques for secure electronic commerce transaction and rights management 64 1999
6,832,316 Systems and methods for protecting data secrecy and integrity 80 2000
7,092,914 Methods for matching, selecting, narrowcasting, and/or classifying based on rights management and/or other information 41 2000
6,959,384 Systems and methods for authenticating and protecting the integrity of data streams and other data 79 2000
6,973,499 Ticketing and keying for orchestrating distribution of network content 17 2000
7,085,839 Network content management 14 2000
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7,062,500 Techniques for defining, using and manipulating rights management data structures 77 2000
7,095,854 Systems and methods for secure transaction management and electronic rights protection 41 2000
6,292,569 Systems and methods using cryptography to protect secure computing environments 305 2000
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6,449,367 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels 273 2001
7,107,448 Systems and methods for governing content rendering, protection, and management applications 13 2001
7,050,586 Systems and methods for retrofitting electronic appliances to accept different content formats 12 2001
7,120,802 Systems and methods for using cryptography to protect secure computing environments 32 2001
2003/0163,431 Systems and methods for secure transaction management and electronic rights protection 115 2001
6,640,304 Systems and methods for secure transaction management and electronic rights protection 237 2002
2002/0152,173 System and methods for managing the distribution of electronic content 124 2002
7,051,212 Systems and methods for secure transaction management and electronic rights protection 50 2002
2003/0023,856 Software self-checking systems and methods 80 2002
6,618,484 Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels 162 2002
6,938,021 Methods for matching, selecting, narrowcasting, and/or classifying based on rights management and/or other information 125 2002
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2003/0041,239 Systems and methods using cryptography to protect secure computing environments 61 2002
2004/0133,793 Systems and methods for secure transaction management and electronic rights protection 112 2003
7,100,199 Systems and methods for secure transaction management and electronic rights protection 61 2003
2004/0107,356 Methods and apparatus for persistent control and protection of content 117 2003
2004/0123,129 Trusted infrastructure support systems, methods and techniques for secure electronic commerce transaction and rights management 94 2003
2005/0027,871 Interoperable systems and methods for peer-to-peer service orchestration 141 2004
6,961,854 Methods and systems for encoding and protecting data using digital signature and watermarking techniques 53 2004
2005/0060,560 Systems and methods for protecting data secrecy and integrity 54 2004
7,058,805 Systems and methods for protecting data secrecy and integrity 17 2004
7,107,452 Methods and systems for encoding and protecting data using digital signature and watermarking techniques 28 2005
2006/0248,016 Trusted infrastructure support systems, methods and techniques for secure electronic commerce, electronic transactions, commerce process control and automation, distributed computing, and rights management 31 2006
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2008/0077,531 Systems and methods using cryptography to protect secure computing environments 6 2007
 
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5,201,047 Attribute-based classification and retrieval system 161 1989
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5,301,231 User defined function facility 172 1992
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5,644,686 Expert system and method employing hierarchical knowledge base, and interactive multimedia/hypermedia applications 173 1994
5,504,757 Method for selecting transmission speeds for transmitting data packets over a serial bus 152 1994
5,692,180 Object-oriented cell directory database for a distributed computing environment 173 1995
5,699,427 Method to deter document and intellectual property piracy through individualization 112 1995
5,745,678 Method and system for the secured distribution of multimedia titles 197 1997
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6,393,484 System and method for controlled access to shared-medium public and semi-public internet protocol (IP) networks 209 1999
 
XEROX CORPORATION (12)
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5,449,896 Random access techniques for use with self-clocking glyph codes 136 1993
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DIGIMARC CORPORATION (10)
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MICROSOFT CORPORATION (10)
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INTEL CORPORATION (7)
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5,757,915 Parameterized hash functions for access control 62 1995
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DONALD, THOMAS CHRISTOPHER (1)
4,471,163 Software protection system 269 1981
 
DSI of Hawaii, Inc. (1)
5,335,169 System for tracking multiple rate assessments on transactions 93 1992
 
E-CONTACT TECHNOLOGIES LLC (1)
5,347,579 Personal computer diary 197 1993
 
EASTMAN KODAK COMPANY (1)
5,206,951 Integration of data between typed objects by mutual, direct invocation between object managers corresponding to object types 252 1991
 
EduTech Research Labs, Ltd. (1)
5,458,494 Remotely operable teaching system and method therefor 92 1993
 
Effective Security Systems, Inc. (1)
4,791,565 Apparatus for controlling the use of computer software 171 1984
 
Electronic Signature Lock Corporation (1)
4,621,334 Personal identification apparatus 98 1983
 
EMAX ELECTRONIC MODULES CORPORATION MC CORMICK RD BOX 141 TIMONIUM MD 21093 A MD CORP (1)
4,236,217 Energy utilization or consumption recording arrangement 149 1979
 
Encyclopaedia Britannica, Inc. (1)
5,241,671 Multimedia search system using a plurality of entry path means which indicate interrelatedness of information 595 1989
 
ENTERASYS NETWORKS, INC. (1)
5,136,716 Session control in network for digital data processing system which supports multiple transfer protocols 158 1990
 
ENTRYPOINT, INC. (1)
5,740,549 Information and advertising distribution system and method 1399 1995
 
Etat Francais represente par le Ministre des P.T.T. (C.N.E.T.) (1)
4,807,288 Microprocessor intended particularly for executing the calculation algorithms of a public code encoding system 76 1983
 
FACEBOOK, INC. (1)
5,671,279 Electronic commerce using a secure courier system 596 1995
 
FINANCIAL NEW NETWORK INC., A CORP. OF CALIFORNIA (1)
4,677,434 Access control system for transmitting data from a central station to a plurality of receiving stations and method therefor 254 1984
 
FIRST DATA CORPORATION (1)
4,321,672 Financial data processing system 692 1979
 
FLEHR HOHBACH TEST ALBRITTON & HERBERT LLP (1)
5,758,152 Method and apparatus for the generation and manipulation of data structures 97 1990
 
FLEXERA SOFTWARE LLC (1)
5,390,297 System for controlling the number of concurrent copies of a program in a network based on the number of available licenses 251 1987
 
FREESCALE SEMICONDUCTOR, INC. (1)
5,432,950 System for securing a data processing system and method of operation 93 1993
 
FUJITSU SIEMENS COMPUTERS GMBH (1)
5,224,160 Process for securing and for checking the integrity of the secured programs 125 1992
 
GENERAL COMPUTER CORPORATION (1)
4,525,599 Software protection methods and apparatus 142 1982
 
GREEN WIRELESS LLC (1)
5,355,474 System for multilevel secure database management using a knowledge base with release-based and other security constraints for query, response and update modification 238 1991
 
Information Identification Company, Inc. (1)
4,217,588 Object monitoring method and apparatus 170 1978
 
INFOSPACE, INC. (1)
4,529,870 Cryptographic identification, financial transaction, and credential device 415 1982
 
INTELLECTUAL VENTURES FUND 83 LLC (1)
5,778,385 Link manager for managing links integrating data between application programs 28 1997
 
INTELLISYNC CORPORATION (1)
5,392,390 Method for mapping, translating, and dynamically reconciling data between disparate computer platforms 462 1992
 
INTER*ACT SYSTEMS, INCORPORATED (1)
5,373,440 Promotional game method and apparatus therefor 248 1992
 
INTERACTIVE HOME SYSTEMS (1)
5,721,788 Method and system for digital image signatures 597 1992
 
Interbank Card Association (1)
4,259,720 Security system for electronic funds transfer system 87 1978
 
Intermind Corporation (1)
6,044,205 Communications system for transferring information between memories according to processes transferred with the information 363 1996
 
International Business Systems, Incorporated (1)
5,734,719 Digital information accessing, delivery and production system 383 1996
 
IPG HEALTHCARE 501 LIMITED (1)
5,335,346 Access control policies for an object oriented database, including access control lists which span across object boundaries 265 1991
 
Kabushiki Kaisha Sega Enterprises (1)
5,371,792 CD-ROM disk and security check method for the same 180 1993
 
KABUSHIKI KAISHA TOSHIBA (1)
5,485,622 Password processing system for computer 79 1992
 
KENT RIDGE DIGITAL LABS (1)
5,499,298 Controlled dissemination of digital information 195 1994
 
Key Logic, Inc. (1)
4,584,639 Computer security system 129 1983
 
KOKUSAI DENSHIN DENWA KABUSHIKI KAISHA (1)
5,508,913 Electronic automatic offer matching system for freezer exchange transactions among banks 148 1994
 
L'ETAT FRANCAIS, REPRESENTE PAR SECRETAIRE D'ETAT POSTES ET TELECOMMUNICATIONS (CENTRE NATIONAL D'ETUDES DES TELECOMMUNICATION) (1)
4,337,483 Text video-transmission system provided with means for controlling access to the information 244 1980
 
L'ETAT FRANCIS, REPRESENTE PAR LE SECRETAIRE D'ETAT AUX POSTES ET TELECOMMUNICATIONS (CENTRE NATIONAL D'ETUDES DES DES TELECOMMMUNICATIONS) (1)
4,323,921 System for transmitting information provided with means for controlling access to the information transmitted 355 1980
 
LANRALD DATA MGMT. NV, LLC (1)
5,065,429 Method and apparatus for protecting material on storage media 235 1990
 
LEGERITY, INC. (1)
5,199,074 Encryption system 41 1992
 
LOCKHEED MARTIN CORPORATION (1)
5,343,527 Hybrid encryption method and system for protecting reusable software components 292 1993
 
LUCENT TECHNOLOGIES INC. (1)
5,629,770 Document copying deterrent method using line and word shift techniques 147 1995
 
MAAST PARTNERS LTD, A CALIFORNIA LIMITED PARTNERSHIP (1)
4,484,217 Method and system for remote reporting, particularly for pay television billing 292 1982
 
MACROVISION CORPORATION (1)
5,315,448 Copy protection for hybrid digital video tape recording and unprotected source material 226 1993
 
MATRA COMMUNICATION, SOCIETE ANONYME (1)
5,280,479 Device for insertion of digital packets in a transmission channel 74 1992
 
MCAFEE, INC. (1)
5,361,359 System and method for controlling the use of a computer 204 1992
 
MEDIABAY. COM, INC. (1)
4,528,643 System for reproducing information in material objects at a point of sale location 685 1983
 
MEDIADNA,COM (1)
5,845,281 Method and system for managing a data object so as to comply with predetermined conditions for usage 351 1996
 
Medical Payment Systems, Incorporated (1)
4,858,121 Medical payment system 353 1986
 
MICRONYX, INC. (1)
4,864,616 Cryptographic labeling of electronically stored data 133 1987
 
MONDEX INTERNATIONAL LIMITED (1)
5,440,634 Value transfer system 215 1993
 
MOTOROLA MOBILITY LLC (1)
5,678,170 Method and apparatus for monitoring and limiting distribution of data 61 1994
 
National Information Utilities Corporation (1)
4,768,087 Education utility 247 1985
 
NATIONAL INSTRUMENTS CORPORATION (1)
6,102,965 System and method for providing client/server access to graphical programs 96 1997
 
NATIONAL RURAL TELECOMMUNICATIONS COOPERATIVE (1)
4,893,248 Monitoring and reporting system for remote terminals 275 1987
 
NEWFREY LLC (1)
5,996,756 Yarn supply apparatus and clutch arrangement therefor 8 1998
 
NEXTLEVEL SYSTEM OF DELAWARE (1)
5,010,571 Metering retrieval of encrypted data stored in customer data retrieval terminal 398 1986
 
NINTENDO CO., LTD. (1)
4,305,131 Dialog between TV movies and human viewers 544 1980
 
North American Philips Corporation (1)
4,442,486 Protected programmable apparatus 181 1981
 
NOVA BIOMEDICAL CORPORATION (1)
4,975,647 Controlling machine operation with respect to consumable accessory units 193 1988
 
OPENTV, INC. (1)
5,625,693 Apparatus and method for authenticating transmitting applications in an interactive TV system 168 1995
 
ORACLE INTERNATIONAL CORPORATION (1)
5,754,849 Self-describing object providing dynamic manipulation of heterogeneous data values and semantic identity between memory and transmission representations 195 1996
 
PACKETVIDEO CORPORATION (1)
5,636,276 Device for the distribution of music information in digital form 434 1995
 
Panafacom Limited (1)
4,701,846 Computer system capable of interruption using special protection code for write interruption region of memory device 63 1986
 
PANASONIC ELECTRIC WORKS CO., LTD. (1)
6,085,238 Virtual LAN system 367 1997
 
PARKER-HANNIFIN CORPORATION (1)
5,473,692 Roving software license for a hardware agent 545 1994
 
PENTA SYSTEMS INTERNATIONAL, IN., A CORP OF MD (1)
4,458,315 Apparatus and method for preventing unauthorized use of computer programs 297 1982
 
Pioneer Electronic Corporation (1)
5,940,505 Information recording method and apparatus, function recording method and apparatus, and information reproducing method and apparatus 49 1996
 
PREVIEW SOFTWARE (1)
4,658,093 Software distribution system 762 1983
 
Pride Software Development Corp. (1)
4,796,220 Method of controlling the copying of software 371 1986
 
PRIME COMPUTER, INC. (1)
4,924,378 License mangagement system and license storage key 430 1988
 
PTT Research (1)
5,504,837 Method for resolving conflicts among distributed entities through the generation of counter proposals by transversing a goal hierarchy with acceptable, unacceptable, and indeterminate nodes 184 1993
 
PUBLIC ESTABLISHMENT (1)
4,816,655 Method and apparatus for checking the authenticity of individual-linked documents and the identity of the holders thereof 106 1986
 
PUBLIC KEY PARTNERS (1)
4,995,082 Method for identifying subscribers and for generating and verifying electronic signatures in a data exchange system 202 1990
 
Pueblo Technologies, Inc. (1)
4,685,056 Computer security device 189 1985
 
QMS, INC. (1)
4,888,798 Modular software security 229 1986
 
QUALCOMM INCORPORATED (1)
5,103,459 System and method for generating signal waveforms in a CDMA cellular telephone system 1578 1990
 
RAINBOW TECHNOLOGIES, INC. (1)
4,593,353 Software protection method and apparatus 232 1981
 
RAKUTEN, INC. (1)
5,455,953 Authorization system for obtaining in single step both identification and access rights of client to server directly from encrypted authorization ticket 411 1993
 
RAYTHEON BBN TECHNOLOGIES CORP. (1)
5,319,735 Embedded signalling 603 1991
 
Remote Systems, Inc. (1)
4,652,990 Protected software access control apparatus and method 219 1983
 
RESPONSE REWARDS SYSTEMS, L.C. (1)
5,759,101 Central and remote evaluation of responses of participatory broadcast audience with automatic crediting and couponing 287 1994
 
Romox, Inc. (1)
4,680,731 Reprogrammable cartridge memory with built-in identification circuitry and programming method 91 1986
 
ROUND ROCK RESEARCH, LLC (1)
5,577,209 Apparatus and method for providing multi-level security for communication among computers and terminals on a network 266 1994
 
RUNTIME INNOVATIONS LIMITED, 1.02 KELVIN CAMPUS, WEST OF SCOTLAND SCIENCE PARK, GLASGOW, G20 OSP, (1)
4,868,736 Code operated access control system for electronic data store 45 1987
 
SACHIKO OKANO (1)
5,504,818 Information processing system using error-correcting codes and cryptography 215 1994
 
SAFENET, INC. (1)
5,337,357 Method of software distribution protection 292 1993
 
SAMSUNG ELECTRONICS CO., LTD. (1)
4,494,156 Selectable format computer disk copier machine 167 1982
 
Sangamo Weston, Inc. (1)
4,361,877 Billing recorder with non-volatile solid state memory 191 1980
 
SEAGATE TECHNOLOGY LLC (1)
5,408,501 Data transfer system 33 1993
 
SECURE COMPUTING TECHNOLOGY CORPORATION (1)
5,276,735 Data enclave and trusted path system 350 1992
 
SECURE-TIME, INC., A CORP OF IDAHO (1)
4,700,296 Electronic access control system 117 1985
 
Securities Dynamics Technologies, Inc. (1)
5,237,614 Integrated network security system 336 1991
 
SECURITY SOFTWARE AMERICA, INC., A CORP. OF DE (1)
4,757,533 Security system for microcomputers 241 1985
 
SGS-THOMSON MICROELECTRONICS, INC. (1)
4,609,985 Microcomputer with severable ROM 39 1982
 
SILANIS TECHNOLOGY INC. (1)
5,606,609 Electronic document verification system and method 625 1994
 
SILICON GRAPHICS INTERNATIONAL, CORP. (1)
5,390,330 Control system and method for direct execution of software application information models without code generation 151 1993
 
SMITH ENGINEERING, A SOLE PROPRIETORSHIP (1)
4,462,076 Video game cartridge recognition and security system 236 1982
 
Software Concepts, Inc. (1)
4,740,890 Software protection system with trial period usage code and unlimited use unlocking code both recorded on program storage media 368 1983
 
SOFTWARE SECURITY, INC. (1)
4,562,306 Method and apparatus for protecting computer software utilizing an active coded hardware device 216 1983
 
Special Effects Software, Inc. (1)
5,199,066 Method and apparatus for protecting software 190 1989
 
SPYRUS, INC. (1)
5,457,746 System and method for access control for portable data storage media 405 1994
 
ST. PATENT HOLDINGS LLC (1)
5,509,070 Method for encouraging purchase of executable and non-executable software 519 1992
 
STANDARD MICROSYSTEMS CORPORATION (1)
4,513,174 Software security method using partial fabrication of proprietary control word decoders and microinstruction memories 164 1981
 
STAR CO RANGER DIGITAL, LLC (1)
2004/0095,382 Portable memory drive retaining personalized interface on multiple host computers 3 2002
 
STEVEN M. HOFFBERG 2004-1 GRAT (1)
2002/0151,992 Media recording device with packet data interface 9 2002
 
STRATEGIC PROCESSING CORPORATION (1)
4,799,156 Interactive market management system 1711 1986
 
SURETY, LLC (1)
5,373,561 Method of extending the validity of a cryptographic certificate 217 1992
 
SYBASE, INC. (1)
5,572,673 Secure multi-level system for executing stored procedures 160 1993
 
SYMANTEC CORPORATION (1)
5,530,752 Systems and methods for protecting software from unlicensed copying and use 121 1994
 
TAGAWA, RICHARD S. (1)
5,732,398 Self-service system for selling travel-related services or products 386 1995
 
TESTDRIVE CORPORATION (1)
5,341,429 Transformation of ephemeral material 393 1992
 
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (1)
4,309,569 Method of providing digital signatures 215 1979
 
The Marconi Company Limited (1)
4,232,193 Message signal scrambling apparatus 158 1978
 
The United States of America as represented by the Secretary of the Army (1)
5,422,645 Delayed laser retroreflector pulse technique and system 19 1994
 
THOMSON LICENSING (1)
6,141,753 Secure distribution of digital representations 212 1998
 
THORN EMI PLC (1)
5,079,648 Marked recorded signals 195 1989
 
Tibco, Inc. (1)
5,557,798 Apparatus and method for providing decoupling of data exchange details for providing high performance communication between software processes 458 1990
 
TITAN CORPORATION, THE (1)
4,712,238 Selective-subscription descrambling 240 1984
 
Tokyo Electric Co., Ltd. (1)
4,220,991 Electronic cash register with removable memory packs for cashier identification 182 1978
 
Tokyo Shibaura Denki Kabushiki Kaisha (1)
4,593,183 Automatic transaction machine 99 1983
 
TRAFALGAR INDUSTRIES, INC. (MERGED INTO) (1)
4,265,371 Foodstuff vending apparatus employing improved solid-state type control apparatus 72 1978
 
U S WEST TECHNOLOGIES, INC. (1)
5,550,971 Method and system for generating a user interface adaptable to various database management systems 183 1995
 
UNICATE B.V. (1)
5,354,097 Security of objects or documents 74 1992
 
UNILOC LUXEMBOURG S. A. (1)
5,490,216 System for software registration 208 1993
 
UNISYS CAD/CAM (1)
4,683,968 System for preventing software piracy employing multi-encrypted keys and single decryption circuit modules 79 1985
 
UNISYS CORPORATION (1)
5,111,390 Software security system for maintaining integrity of compiled object code by restricting users ability to define compilers 105 1988
 
UNITRAC, LLC (1)
5,521,815 Uniform system for verifying and tracking articles of value 191 1993
 
UP TWO, INC. (1)
5,640,546 Composition of systems of objects by interlocking coordination, projection, and distribution 130 1995
 
VAN DETSAN NETWORKS LIMITED LIABILITY COMPANY (1)
4,926,480 Card-computer moderated systems 332 1988
 
Verbatim Corporation (1)
4,562,495 Multiple system disk 147 1984
 
VERIZON PATENT AND LICENSING INC. (1)
4,919,545 Distributed security procedure for intelligent networks 161 1988
 
VIDEO-ON-DEMAND VENTURES LLC (1)
4,949,187 Video communications system having a remotely controlled central source of video and audio data 773 1988
 
VISA U.S.A. INC. (1)
4,578,530 End-to-end encryption system and method of operation 298 1983
 
WEBVENTION GROUP LLC (1)
5,251,294 Accessing, assembling, and using bodies of information 122 1990
 
Westinghouse Electric Corp. (1)
4,649,515 Methods and apparatus for system fault diagnosis and control 248 1986
 
WISCONSIN ALUMNI RESEARCH FOUNDATION (1)
4,375,579 Database encryption and decryption circuit and method using subkeys 184 1980
 
WISTRON CORPORATION (1)
6,983,371 Super-distribution of protected digital content 123 2000
 
Xidak, Inc. (1)
5,201,046 Relational database management system and method for storing, retrieving and modifying directed graph data structures 183 1990
 
YT ACQUISITION CORPORATION (1)
7,152,045 Tokenless identification system for authorization of electronic transactions and electronic transmissions 67 2002
 
Other [Check patent profile for assignment information] (36)
4,270,182 Automated information input, storage, and retrieval system 200 1974
4,246,638 Method and apparatus for controlling usage of a programmable computing machine 70 1978
4,232,317 Quantized hyperbolic and inverse hyperbolic object location system 90 1978
4,670,857 Cartridge-controlled system whose use is limited to authorized cartridges 129 1981
4,528,588 Method and apparatus for marking the information content of an information carrying signal 462 1982
4,523,271 Software protection method and apparatus 50 1982
4,462,078 Computer program protection method 161 1982
4,558,176 Computer systems to inhibit unauthorized copying, unauthorized usage, and automated cracking of protected software 375 1982
4,553,252 Counting computer software cartridge 152 1982
4,593,376 System for vending program cartridges which have circuitry for inhibiting program usage after preset time interval expires 308 1983
4,573,119 Computer software protection system 77 1983
4,584,641 Copyprotecting system for software protection 213 1983
4,677,552 International commodity trade exchange 585 1984
4,595,950 Method and apparatus for marking the information content of an information carrying signal 363 1984
4,688,169 Computer software security system 224 1985
4,823,264 Electronic funds transfer system 570 1986
4,748,561 Method of protecting computer software 60 1986
4,747,139 Software security method and systems 245 1986
4,796,181 Billing system for computer software 245 1986
4,999,806 Software distribution system 498 1987
4,868,877 Public key/signature cryptosystem with enhanced digital signature certification 398 1988
5,047,928 Billing system for computer software 366 1989
5,005,200 Public key/signature cryptosystem with enhanced digital signature certification 367 1989
5,001,752 Public/key date-time notary facility 208 1989
5,163,091 Knowledge based system for document authentication (apparatus) 87 1990
5,136,643 Public/key date-time notary facility 216 1990
5,150,407 Secured data storage devices 121 1991
5,185,717 Tamper resistant module having logical elements arranged in multiple layers on the outer surface of a substrate to protect stored information 119 1992
5,214,702 Public key/signature cryptosystem with enhanced digital signature certification 275 1992
5,422,953 Personal date/time notary device 154 1993
5,390,247 Method and apparatus for creating, supporting, and using travelling programs 167 1993
5,337,360 Method and apparatus for creating, supporting, and using travelling programs 161 1994
5,689,566 Network with secure communications sessions 239 1995
5,692,980 Kick bag game and apparatus kit 16 1996
5,748,960 Method and apparatus for validating travelling object-oriented programs with digital signatures 139 1996
5,842,173 Computer-based surgical services management system 112 1997

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
MICROSOFT CORPORATION (2)
8,284,942 Persisting private/public key pairs in password-encrypted files for transportation to local cryptographic store 2 2004
8,792,721 Image recognition of content 0 2013
 
COCOON DATA HOLDINGS LIMITED (1)
8,806,207 System and method for securing data 0 2008
 
VODAFONE GROUP PLC (1)
8,600,060 Telecommunications device security 0 2007

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