| Patent Number |
Title Of Patent |
Date Issued |
| 8055910 |
Reprogrammable security for controlling piracy and enabling interactive content |
November 8, 2011 |
| Technologies to transfer responsibility and control over security from player makers to content authors by enabling integration of security logic and content. An exemplary optical disk (200) carries an encrypted digital video title combined with data processing operations that implem |
| 7987510 |
Self-protecting digital content |
July 26, 2011 |
| Technologies are disclosed to transfer responsibility and control over security from player makers to content authors by enabling integration of security logic and content. An exemplary optical disc carries an encrypted digital video title combined with data processing operations tha |
| 7941666 |
Payment smart cards with hierarchical session key derivation providing security against differen |
May 10, 2011 |
| Chip cards are used to secure credit and debit payment transactions. To prevent fraudulent transactions, the card must protect cryptographic keys used to authenticate transactions. In particular, cards should resist differential power analysis and/or other attacks. To address security |
| 7792287 |
Leak-resistant cryptographic payment smartcard |
September 7, 2010 |
| We disclose methods and apparatuses for securing cryptographic devices against attacks involving external monitoring and analysis. A "self-healing" property is introduced, enabling security to be continually re-established following partial compromises. In addition to producing usefu |
| 7787620 |
Prevention of side channel attacks against block cipher implementations and other cryptographic |
August 31, 2010 |
| Methods and apparatuses are disclosed for improving DES and other cryptographic protocols against external monitoring attacks by reducing the amount (and signal-to-noise ratio) of useful information leaked during processing. An improved DES implementation of the invention instead use |
| 7668310 |
Cryptographic computation using masking to prevent differential power analysis and other attacks |
February 23, 2010 |
| Methods and apparatuses are disclosed for improving DES and other cryptographic protocols against external monitoring attacks by reducing the amount (and signal-to-noise ratio) of useful information leaked during processing. An improved DES implementation of the invention instead use |
| 7634083 |
Differential power analysis |
December 15, 2009 |
| Information leaked from smart cards and other tamper resistant cryptographic devices can be statistically analyzed to determine keys or other secret data. A data collection and analysis system is configured with an analog-to-digital converter connected to measure the device's consump |
| 7599488 |
Differential power analysis |
October 6, 2009 |
| Information leaked from smart cards and other tamper resistant cryptographic devices can be statistically analyzed to determine keys or other secret data. A data collection and analysis system is configured with an analog-to-digital converter connected to measure the device's consump |
| 7587044 |
Differential power analysis method and apparatus |
September 8, 2009 |
| Information leaked from smart cards and other tamper resistant cryptographic devices can be statistically analyzed to determine keys or other secret data. A data collection and analysis system is configured with an analog-to-digital converter connected to measure the device's consump |
| 7506165 |
Leak-resistant cryptographic payment smartcard |
March 17, 2009 |
| We disclose methods and apparatuses for securing cryptographic devices against attacks involving external monitoring and analysis. A "self-healing" property is introduced, enabling security to be continually re-established following partial compromises. In addition to producing usefu |
| 7039816 |
Using smartcards or other cryptographic modules for enabling connected devices to access encrypt |
May 2, 2006 |
| To prevent piracy, audiovisual content is encrypted prior to transmission to consumers. A low-cost, high-security cryptographic rights module (such as a smartcard) enables devices such as players/displays to decode such content. Security-critical functions may be performed by the cry |
| 6999943 |
Routing methods and systems for increasing payment transaction volume and profitability |
February 14, 2006 |
| Customers often have access to multiple payment methods for any given transaction. In one embodiment of the invention, a merchant obtains information regarding multiple payment methods from a customer, and sends said information to a transaction evaluator. Via computer networks, the |
| 6978370 |
Method and system for copy-prevention of digital copyright works |
December 20, 2005 |
| Methods and apparati for marking digital material and for detecting marks therein. For mark detection, the material is divided into a plurality of blocks, to which a non-collision resistant compression function is applied. Compression outputs are placed in a shift register, whose value |
| 6654884 |
Hardware-level mitigation and DPA countermeasures for cryptographic devices |
November 25, 2003 |
| Differential power analysis is a powerful cryptanalytic method that can be used to extract secret keys from cryptographic hardware during operation. To reduce the risk of compromise, cryptographic hardware can employ countermeasures to reduce the amount of secret information that can be |
| 6640305 |
Digital content protection method and apparatus |
October 28, 2003 |
| Before use, a population of tamper-resistant cryptographic enforcement devices is partitioned into groups and issued one or more group keys. Each tamper-resistant device contains multiple computational units to control access to digital content. One of the computational units within each |
| 6539092 |
Leak-resistant cryptographic indexed key update |
March 25, 2003 |
| Methods and apparatuses for increasing the leak-resistance of cryptographic systems using an indexed key update technique are disclosed. In one embodiment, a cryptographic client device maintains a secret key value as part of its state. The client can update its secret value at any time, |
| 6510518 |
Balanced cryptographic computational method and apparatus for leak minimizational in smartcards |
January 21, 2003 |
| Cryptographic devices that leak information about their secrets through externally monitorable characteristics (such as electromagnetic radiation and power consumption) may be vulnerable to attack, and previously-known methods that could address such leaking are inappropriate for smartca |
| 6381699 |
Leak-resistant cryptographic method and apparatus |
April 30, 2002 |
| The present invention provides a method and apparatus for securing cryptographic devices against attacks involving external monitoring and analysis. A "self-healing" property is introduced, enabling security to be continually re-established following partial compromises. In addition to |
| 6327661 |
Using unpredictable information to minimize leakage from smartcards and other cryptosystems |
December 4, 2001 |
| Methods and apparatuses are disclosed for securing cryptosystems against external monitoring attacks by reducing the amount (and signal to noise ratio) of useful information leaked during processing. This is generally accomplished by incorporating unpredictable information into the c |
| 6304658 |
Leak-resistant cryptographic method and apparatus |
October 16, 2001 |
| The present invention provides a method and apparatus for securing cryptographic devices against attacks involving external monitoring and analysis. A "self-healing" property is introduced, enabling security to be continually re-established following partial compromises. In addition to |
| 6298442 |
Secure modular exponentiation with leak minimization for smartcards and other cryptosystems |
October 2, 2001 |
| Methods and apparatuses are disclosed for securing cryptosystems against external monitoring attacks by reducing the amount (and signal to noise ratio) of useful information leaked during processing. In general, this is accomplished by implementing critical operations using "branchless" |
| 6289455 |
Method and apparatus for preventing piracy of digital content |
September 11, 2001 |
| A secure cryptographic rights unit for cryptographically regulating access to digital content includes an interface control processor and a specialized cryptographic unit that protects access to a memory. Rights keys, which allow access to content, are added by the cryptographic unit |
| 6278783 |
Des and other cryptographic, processes with leak minimization for smartcards and other cryptosys |
August 21, 2001 |
| Methods and apparatuses are disclosed for improving DES and other cryptographic protocols against external monitoring attacks by reducing the amount (and signal-to-noise ratio) of useful information leaked during processing. An improved DES implementation of the invention instead uses |
