US Patent No: 5,533,123

Number of patents in Portfolio can not be more than 2000

Programmable distributed personal security

2 Status Updates

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ATTORNEY / AGENT: (SPONSORED)
 

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Abstract

The present invention is embodied in a Secured Processing Unit (SPU) chip, a microprocessor designed especially for secure data processing. By integrating keys, encryption/decryption engines and algorithms in the SPU, the entire security process is rendered portable and easily distributed across physical boundaries. The invention is based on the orchestration of three interrelated systems: (i) detectors, which alert the SPU to the existence, and help characterize the nature, of a security attack; (ii) filters, which correlate the data from the various detectors, weighing the severity of the attack against the risk to the SPU's integrity, both to its secret data and to the design itself; and (iii) responses, which are countermeasures, calculated by the filters to be most appropriate under the circumstances, to deal with the attack or attacks present. The present invention, with wide capability in all three of the detectors, filters and responses, allows a great degree of flexibility for programming an appropriate level of security/policy into an SPU-based application.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NATIONAL SEMICONDUCTOR CORPORATIONSANTA CLARA, CA4706

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Davis, Timothy D Arlington, TX 14 327
Duncan, Richard L Bedford, TX 23 536
Force, Gordon San Jose, CA 4 291
Norcross, Thomas M Arlington, TX 4 316
Shay, Michael J Arlington, TX 11 372
Short, Timothy A Duncanville, TX 3 194

Cited Art

Patent Info (Count) # Cites Year
 
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4,860,351 Tamper-resistant packaging for protection of information stored in electronic circuitry 44 1986
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5,159,629 Data protection by detection of intrusion into electronic assemblies 50 1991
 
NCR CORPORATION (4)
4,593,384 Security device for the secure storage of sensitive data 89 1984
4,691,350 Security device for stored sensitive data 108 1986
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4,807,284 Security device for sensitive data 50 1987
 
GENERAL INSTRUMENT CORPORATION (3)
4,933,898 Secure integrated circuit chip with conductive shield 94 1989
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GAO GESELLSCHAFT FUR AUTOMATION UND ORGANISATION MBH (1)
4,783,801 Apparatus for protecting secret information 34 1984
 
GENERAL DYNAMICS DECISION SYSTEMS, INC. (1)
4,598,170 Secure microprocessor 24 1984
 
KABUSHIKI KAISHA TOSHIBA (1)
4,764,959 Single-chip microcomputer with encryptable function on program memory 20 1984
 
MOTOROLA, INC. (1)
4,446,475 Means and method for disabling access to a memory 28 1981
 
SHARP KABUSHIKI KAISHA (1)
4,926,388 Electronic device for independently erasing secret and non-secret data from memory 8 1988
 
TEXAS INSTRUMENTS INCORPORATED (1)
4,521,853 Secure microprocessor/microcomputer with secured memory 91 1982
 
UNIVERSITY OF TECHNOLOGY, SYDNEY (1)
5,353,350 Electro-active cradle circuits for the detection of access or penetration 59 1992
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
INTERTRUST TECHNOLOGIES CORP. (51)
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5,949,876 Systems and methods for secure transaction management and electronic rights protection 485 1997
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ROUND ROCK RESEARCH, LLC (12)
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YT ACQUISITION CORPORATION (12)
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CISCO TECHNOLOGY, INC. (8)
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EQUIFAX, INC. (7)
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INTEL CORPORATION (5)
6,260,149 Method and apparatus for logic and power isolation during power management 2 1997
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BOLIQUE APPLICATIONS LTD., L.L.C. (4)
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8,417,956 Encryption and authentication systems and methods 0 2011
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (4)
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PITNEY BOWES INC. (4)
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SUN MICROSYSTEMS, INC. (4)
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INFINEON TECHNOLOGIES AG (3)
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MICROSOFT CORPORATION (3)
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NUMECENT HOLDINGS, INC. (3)
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PANASONIC CORPORATION (3)
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SYMANTEC CORPORATION (3)
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MASSACHUSETTS INSTITUTE OF TECHNOLOGY (2)
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NAGRAVISION S.A. (2)
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NCR CORPORATION (2)
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NVIDIA CORPORATION (2)
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GENERAL INSTRUMENT CORPORATION (1)
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GLOBALFOUNDRIES INC. (1)
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NATIONAL SEMICONDUCTOR CORPORATION (1)
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NOVELPOINT SECURITY LLC (1)
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NXP B.V. (1)
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OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (3)
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