Exponentiation cryptographic apparatus and method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4424414
SERIAL NO

05901770

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Abstract

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A cryptographic system transmits a computationally secure cryptogram that is generated from a secret transformation of the message sent by the authorized transmitter; the cryptogram is again transformed by the authorized receiver using a secret reciprocal transformation to reproduce the message sent. The secret transformations use secret cipher keys that are known only by the authorized transmitter and receiver. The transformations are performed with nonsecret operations, exponentiation, that are easily performed but extremely difficult to invert. It is computationally infeasible for an eavesdropper either to solve known plaintext-ciphertext pairs for the secret cipher keys, or to invert the nonsecret operations that are used to generate the cryptogram.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITYPALO ALTO, CA2427

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hellman, Martin E Stanford, CA 10 2900
Pohlig, Stephen C Acton, MA 1 343

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Patent Info (Count) # Cites Year
 
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9240089 Systems and methods for time variable financial authentication 0 2009
 
MICROSOFT TECHNOLOGY LICENSING, LLC (50)
* 2004/0210,623 Virtual network topology generation 94 2003
7636917 Network load balancing with host status information 25 2003
7613822 Network load balancing with session information 43 2003
7590736 Flexible network load balancing 42 2003
* 2004/0267,920 Flexible network load balancing 108 2003
* 2004/0268,358 Network load balancing with host status information 167 2003
7606929 Network load balancing with connection manipulation 7 2003
7567504 Network load balancing with traffic routing 48 2003
* 2005/0055,435 Network load balancing with connection manipulation 101 2003
8122106 Integrating design, deployment, and management phases for systems 7 2003
7890543 Architecture for distributed computing system and automated design, deployment, and management of distributed applications 37 2003
7289629 Primitives for fast secure hash functions and stream ciphers 1 2004
* 2005/0175,176 Primitives for fast secure hash functions and stream ciphers 1 2004
* 7778422 Security associations for devices 7 2004
7497379 Counterfeit and tamper resistant labels with randomly occurring features 29 2004
* 2005/0190,914 Counterfeit and tamper resistant labels with randomly occurring features 26 2004
7886041 Design time validation of systems 43 2004
* 2004/0193,388 Design time validation of systems 53 2004
7577844 Systems and methods for encoding randomly distributed features in an object 19 2004
* 2005/0246,529 Isolated persistent identity storage for authentication of computing devies 50 2004
7669235 Secure domain join for computing devices 5 2004
7305549 Filters to isolate untrusted ports of switches 32 2004
7305561 Establishing computing trust with a staging area 38 2004
7336806 Iris-based biometric identification 24 2004
* 2005/0125,212 System and method for designing a logical model of a distributed computer system and deploying physical resources according to the logical model 49 2004
7792931 Model-based system provisioning 8 2005
8489728 Model-based system monitoring 4 2005
7802144 Model-based system monitoring 29 2005
7797147 Model-based system monitoring 5 2005
8549513 Model-based virtual system provisioning 10 2005
7890951 Model-based provisioning of test environments 46 2005
* 2007/0016,393 Model-based propagation of attributes 3 2005
* 2007/0006,218 Model-based virtual system provisioning 40 2005
* 2006/0037,002 Model-based provisioning of test environments 44 2005
* 2006/0025,985 Model-Based system management 125 2005
7684964 Model and system state synchronization 5 2005
7941309 Modeling IT operations/policies 2 2005
* 2007/0112,847 Modeling IT operations/policies 61 2005
7630877 Architecture for distributed computing system and automated design, deployment, and management of distributed applications 62 2005
* 2006/0271,341 Architecture for distributed computing system and automated design, deployment, and management of distributed applications 60 2005
7574343 System and method for logical modeling of distributed computer systems 7 2006
7689676 Model-based policy application 24 2007
* 2008/0059,214 Model-Based Policy Application 45 2007
8127133 Labeling of data objects to apply and enforce policies 5 2007
* 2008/0184,329 LABELING OF DATA OBJECTS TO APPLY AND ENFORCE POLICIES 8 2007
* 2008/0288,622 Managing Server Farms 3 2007
7444007 Iris-based biometric identification 10 2007
* 2008/0025,575 Iris-Based Biometric Identification 9 2007
7878398 Counterfeit and tamper resistant labels with randomly occurring features 5 2009
9317270 Model-based virtual system provisioning 0 2013
 
Fujitsu Siemens Computers GmbH (1)
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Wisteria Trading, Inc. (1)
7991188 Optimization methods for the insertion, protection, and detection of digital watermarks in digital data 4 2007
 
GOOGLE TECHNOLOGY HOLDINGS LLC (4)
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6574333 State machine based universal voice grade cards 8 1999
7320073 Secure method for roaming keys and certificates 13 2003
* 2004/0199,774 Secure method for roaming keys and certificates 3 2003
 
THE TRUSTEES OF PRINCETON UNIVERSITY (1)
* 2004/0250,073 Protocol for hybrid authenticated key establishment 9 2003
 
GENWORTH FINANCIAL, INC. (1)
* 2004/0133,699 System and method for performing data transfer 2 2002
 
CROWLEY, JOHN J. (1)
* 5375169 Cryptographic key management method and apparatus 124 1993
 
KEYBYTE TECHNOLOGIES, INC. (1)
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GENERAL ELECTRIC COMPANY (2)
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VERIZON PATENT AND LICENSING INC. (7)
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* 5588061 System and method for identity verification, forming joint signatures and session key agreement in an RSA public cryptosystem 51 1994
* 5535276 Yaksha, an improved system and method for securing communications using split private key asymmetric cryptography 373 1994
* 5748735 Securing E-mail communications and encrypted file storage using yaksha split private key asymmetric cryptography 167 1996
* 5737419 Computer system for securing communications using split private key asymmetric cryptography 111 1996
* 5838792 Computer system for centralized session key distribution, privacy enhanced messaging and information distribution using a split private key public cryptosystem 102 1996
* 5905799 Programmed computer for identity verification, forming joint signatures and session key agreement in an RSA public cryptosystem 35 1996
 
PREMINOS CORPORATION (1)
* 5812669 Method and system for providing secure EDI over an open network 104 1995
 
THOMSON LICENSING (2)
* 7545932 Secure authenticated channel 4 2004
* 2006/0093,138 Secure authenticated channel 19 2004
 
COMCAST CABLE COMMUNICATIONS, LLC (3)
* 5787172 Apparatus and method for establishing a cryptographic link between elements of a system 244 1994
* 6148400 Apparatus and method for establishing a crytographic link between elements of a system 45 1998
6456716 Apparatus and method for establishing a crytographic link between elements of a system 24 2000
 
ERICSSON INC. (1)
* 5499295 Method and apparatus for feature authorization and software copy protection in RF communications devices 147 1993
 
DIGITAL RIVER, INC. (14)
* 5903647 Self-launching encrypted digital information distribution system 63 1995
* 5883954 Self-launching encrypted try before you buy software distribution system 60 1995
* 5883955 On-line try before you buy software distribution system 142 1995
* 5870543 System for preventing unauthorized copying of active software 93 1997
* 5907617 Try before you buy software distribution and marketing system 95 1997
* 5887060 Central database system for automatic software program sales 36 1997
7058597 Apparatus and method for adaptive fraud screening for electronic commerce transactions 15 1999
7617124 Apparatus and method for secure downloading of files 5 2000
7165051 Electronic commerce system and method for detecting fraud 87 2005
* 2005/0154,676 Electronic commerce system method for detecting fraud 19 2005
8271396 Electronic commerce system and method for detecting fraud 2 2006
7881972 Electronic commerce system and method for detecting fraud 1 2006
8050980 Secure downloading of a file from a network system and method 1 2009
* 2010/0017,417 Secure Downloading of a File from a Network System and Method 2 2009
 
UNIKEN INC. (4)
7949867 Secure communications 4 2006
* 2008/0022,091 Secure Communications 1 2006
7949869 Establishing relative identity 3 2010
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CORIANT OY (2)
* 6422461 Method and system for ensuring connection of a module to an electronic apparatus 0 1999
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THE BOEING COMPANY (1)
* 2008/0304,669 RECIPIENT-SIGNED ENCRYPTION CERTIFICATES FOR A PUBLIC KEY INFRASTRUCTURE 8 2007
 
PREVIEW SOFTWARE (1)
* 4658093 Software distribution system 887 1983
 
Next Software, Inc. (2)
* 5159632 Method and apparatus for public key exchange in a cryptographic system 128 1991
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WISTRON CORPORATION (5)
6574609 Secure electronic content management system 345 1998
6389538 System for tracking end-user electronic content usage 566 1998
6611812 Secure electronic content distribution on CDS and DVDs 308 1999
6389403 Method and apparatus for uniquely identifying a customer purchase in an electronic distribution system 216 1999
6983371 Super-distribution of protected digital content 177 2000
 
TecSec, Inc. (12)
* 5369707 Secure network method and apparatus 207 1993
* 5369702 Distributed cryptographic object method 243 1993
* 5717755 Distributed cryptographic object method 70 1994
* 5680452 Distributed cryptographic object method 119 1995
* 5898781 Distributed cryptographic object method 66 1997
6694433 XML encryption scheme 19 1999
7095852 Cryptographic key split binder for use with tagged data elements 70 2001
* 2004/0208,316 Cryptographic key split binder for use with tagged data elements 5 2001
7079653 Cryptographic key split binding process and apparatus 19 2002
* 2003/0039,358 Cryptographic key split binding process and apparatus 7 2002
8077870 Cryptographic key split binder for use with tagged data elements 8 2010
8712046 Cryptographic key split combiner 0 2012
 
E-CONTACT TECHNOLOGIES LLC (1)
* 5189700 Devices to (1) supply authenticated time and (2) time stamp and authenticate digital documents 113 1991
 
ZHIGU HOLDINGS LIMITED (5)
7606898 System and method for distributed management of shared computers 12 2000
7711121 System and method for distributed management of shared computers 0 2004
* 2005/0091,078 System and method for distributed management of shared computers 30 2004
7739380 System and method for distributed management of shared computers 1 2004
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SAFENET, INC. (2)
* 4891781 Modulo arithmetic processor chip 32 1988
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MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (4)
* 5124117 Cryptographic key distribution method and system 96 1991
* 5272755 Public key cryptosystem with an elliptic curve 104 1992
* 5351297 Method of privacy communication using elliptic curves 48 1993
* 5442707 Method for generating and verifying electronic signatures and privacy communication using elliptic curves 97 1993
 
STEVEN M. HOFFBERG 2004-1 GRAT (4)
8369967 Alarm system controller and a method for controlling an alarm system 18 2011
8364136 Mobile system, a method of operating mobile system and a non-transitory computer readable medium for a programmable control of a mobile system 38 2011
8892495 Adaptive pattern recognition based controller apparatus and method and human-interface therefore 1 2013
9535563 Internet appliance system and method 0 2013
 
AT&T CORP. (1)
* 6058187 Secure telecommunications data transmission 68 1997
 
UNIVERSITY OF SOUTHERN CALIFORNIA (1)
* 7280663 Encryption system based on crossed inverse quasigroups 4 2000
 
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION;INTELLECTUAL PROPERTY & STANDARDS (1)
* 6141422 Secure cryptographic multi-exponentiation method and coprocessor subsystem 14 1997
* Cited By Examiner