Actel

DPA Patents

Microsemi offers select FPGAs with a sub-license to the DPA patent portfolio owned by Cryptography Research, Inc. The DPA patent portfolio describes a number of fundamental techniques used to mitigate against side-channel attacks, such as Differential Power Analysis (DPA). The sub-license allows the purchaser of these Microsemi FPGAs to use any of the patented techniques in the designs they create or buy and then load into the licensed FPGA. The protection techniques can be incorporated into the logic implemented in the FPGA fabric or in the firmware executing on a hard or soft microcontroller in the FPGA.

The following is the current list of patents available for use under the sub-license. Other DPA patents may be added to this list as the patents are issued.

  1. U.S. Patent No. 6,278,783 entitled "DES and Other Cryptographic Processes with Leak Minimization for Smartcards and Other Cryptosystems";
  2. U.S. Patent No. 6,298,442 entitled "Secure Modular Exponentiation for Leak Minimization in Smartcards and Other Cryptosystems";
  3. U.S. Patent No. 6,304,658 entitled "Leak Resistant Cryptographic Method and Apparatus";
  4. U.S. Patent No. 6,327,661 entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and other Cryptosystems";
  5. U.S. Patent No. 6,381,699 entitled "Leak Resistant Cryptographic Method and Apparatus";
  6. U.S. Patent No. 6,510,518 entitled "Balanced Cryptographic Computational Methods and Apparatus for Leak Minimization in Smartcards and other Cryptosystems";
  7. U.S. Patent No. 6,539,092 entitled "Leak Resistant Cryptographic Indexed Key Update";
  8. U.S. Patent No. 6,654,884 entitled "Hardware-level Mitigation and DPA Countermeasures for Cryptographic Devices";
  9. U.S. Patent No. 7,668,310 entitled "Cryptographic Computation Using Masking to Prevent Differential Power Analysis and Other Attacks";
  10. U.S. Patent Application No. 11/252,898 entitled "Prevention of Side Channel Attacks against Block Cipher Implementations and other Cryptographic Systems";
  11. U.S. Patent Application No. 11/396,975 entitled "Payment Smart Cards with Hierarchical Session Key Derivation Providing Security Against Differential Power Analysis and other Attacks";
  12. U.S. Patent Application No. 11/977,392 entitled "Payment Smart Cards with Hierarchical Session Key Derivation Providing Security Against Differential Power Analysis and other Attacks";
  13. U.S. Patent No. 7,506,165 entitled "Leak-Resistant Cryptographic Payment Smartcard";
  14. U.S. Patent Application No. 11/981,495 entitled "Leak-Resistant Cryptographic Payment Smartcard";
  15. U.S. Patent No. 7,634,083 entitled "Differential Power Analysis";
  16. U.S. Patent No. 7,599,488 entitled "Differential Power Analysis";
  17. U.S. Patent Application No. 12/637,565 entitled "Differential Power Analysis-Resistant Cryptographic Processing";
  18. U.S. Patent No. 7,587,044 entitled "Differential Power Analysis Method and Apparatus";
  19. U.S. Patent Application No. 61/266,948 entitled "Verifiable, Leak-Resistant Encryption and Decryption";
  20. Canadian Patent No. 2,333,095 entitled "Improved DES and Other Cryptographic Processes with Leak Minimization for Smartcards and other Cryptosystems" – "Perfectionnement de Normes Cryptographiques et Autres Procedes Cryptographiques a Reduction des fuites Pour Cartes a Puces et Autres Systemes Cryptographiques";
  21. Canadian Patent No. 2,334,597 entitled "Leak Resistant Cryptographic Indexed Key Update" – "Mise a Jour a Cle de Chiffrage Indexee a Resistance de Fuite";
  22. Israeli Patent No. 139935 entitled "Improved DES and Other Cryptographic Processes with Leak Minimization for Smartcards and Other Cryptosystems";
  23. European Patent No. EP1050133 entitled "Leak-Resistant Cryptographic Method and Apparatus" – "Leckresistentes Kryptographisches Verfahren und Vorrichtung" – "Procede et Appareil Cryptographiques Resistant aux Fuites";
  24. French Patent No. EP1050133 entitled "Leak-Resistant Cryptographic Method and Apparatus" – "Leckresistentes Kryptographisches Verfahren und Vorrichtung" – "Procede et Appareil Cryptographiques Resistant aux Fuites";
  25. German Patent No. EP1050133 entitled "Leak-Resistant Cryptographic Method and Apparatus" – "Leckresistentes Kryptographisches Verfahren und Vorrichtung" – "Procede et Appareil Cryptographiques Resistant aux Fuites";
  26. Great Britain Patent No. EP1050133 entitled "Leak-Resistant Cryptographic Method and Apparatus" – "Leckresistentes Kryptographisches Verfahren und Vorrichtung" – "Procede et Appareil Cryptographiques Resistant aux Fuites";
  27. Swiss Patent No. EP1050133 entitled "Leak-Resistant Cryptographic Method and Apparatus" – "Leckresistentes Kryptographisches Verfahren und Vorrichtung" – "Procede et Appareil Cryptographiques Resistant aux Fuites";
  28. European Patent No. EP1088295 entitled "Balanced Cryptographic Computational Method and Apparatus for Leak Minimization in Smartcards and Other Cryptosystems" – "Ausgewogene Kryptographische Rechenmethode und Apparat zur Schlupfminimierung in Smartcards und Anderen Kryptosystemen" – "Procede de Calcul Cryptographique Equilibre et Dispositif de Minimisation Defuites Dans Les Cartes a Puce et Autres Cryptosystemes";
  29. French Patent No. EP1088295 entitled "Balanced Cryptographic Computational Method and Apparatus for Leak Minimization in Smartcards and Other Cryptosystems" – "Ausgewogene Kryptographische Rechenmethode und Apparat zur Schlupfminimierung in Smartcards und Anderen Kryptosystemen" – "Procede de Calcul Cryptographique Equilibre et Dispositif de Minimisation Defuites Dans Les Cartes a Puce et Autres Cryptosystemes";
  30. German Patent No. EP1088295 entitled "Balanced Cryptographic Computational Method and Apparatus for Leak Minimization in Smartcards and Other Cryptosystems" – "Ausgewogene Kryptographische Rechenmethode und Apparat zur Schlupfminimierung in Smartcards und Anderen Kryptosystemen" – "Procede de Calcul Cryptographique Equilibre et Dispositif de Minimisation Defuites Dans Les Cartes a Puce et Autres Cryptosystemes";
  31. Great Britain Patent No. EP1088295 entitled "Balanced Cryptographic Computational Method and Apparatus for Leak Minimization in Smartcards and Other Cryptosystems" – "Ausgewogene Kryptographische Rechenmethode und Apparat zur Schlupfminimierung in Smartcards und Anderen Kryptosystemen" – "Procede de Calcul Cryptographique Equilibre et Dispositif de Minimisation Defuites Dans Les Cartes a Puce et Autres Cryptosystemes";
  32. Ireland Patent No. EP1088295 entitled "Balanced Cryptographic Computational Method and Apparatus for Leak Minimization in Smartcards and Other Cryptosystems" – "Ausgewogene Kryptographische Rechenmethode und Apparat zur Schlupfminimierung in Smartcards und Anderen Kryptosystemen" – "Procede de Calcul Cryptographique Equilibre et Dispositif de Minimisation Defuites Dans Les Cartes a Puce et Autres Cryptosystemes";
  33. Swiss Patent No. EP1088295 entitled "Balanced Cryptographic Computational Method and Apparatus for Leak Minimization in Smartcards and Other Cryptosystems" – "Ausgewogene Kryptographische Rechenmethode und Apparat zur Schlupfminimierung in Smartcards und Anderen Kryptosystemen" – "Procede de Calcul Cryptographique Equilibre et Dispositif de Minimisation Defuites Dans Les Cartes a Puce et Autres Cryptosystemes";
  34. European Patent No. EP1092297 entitled "Leak Resistant Cryptographic Indexed Key Update" – "Leckresistente Aktualisierung Eines Indexierten Kryptographischenschlüssels " – "Mise a Jour a Cle de Chiffrage Indexee a Resistance de Fuite";
  35. French Patent No. EP1092297 entitled "Leak Resistant Cryptographic Indexed Key Update" – "Leckresistente Aktualisierung Eines Indexierten Kryptographischenschlüssels " – "Mise a Jour a Cle de Chiffrage Indexee a Resistance de Fuite";
  36. German Patent No. EP1092297 entitled "Leak Resistant Cryptographic Indexed Key Update" – "Leckresistente Aktualisierung Eines Indexierten Kryptographischenschlüssels " – "Mise a Jour a Cle de Chiffrage Indexee a Resistance de Fuite";
  37. Great Britain Patent No. EP1092297 entitled "Leak Resistant Cryptographic Indexed Key Update" – "Leckresistente Aktualisierung Eines Indexierten Kryptographischenschlüssels " – "Mise a Jour a Cle de Chiffrage Indexee a Resistance de Fuite";
  38. Swiss Patent No. EP1092297 entitled "Leak Resistant Cryptographic Indexed Key Update" – "Leckresistente Aktualisierung Eines Indexierten Kryptographischenschlüssels " – "Mise a Jour a Cle de Chiffrage Indexee a Resistance de Fuite";
  39. European Patent No. EP1084543 entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and Other Cryptosystems" – "Verwendung von Unvorhersagbarer Information zur Leckminimierung von Chipkarten und Anderen Kryptosystemen " – "Utilisation D'informations non Prévisible Pour Réduire au Maximum les Fuites Provenant des Cartes à Puces et Autres Systèmes Cryptographiques";
  40. French Patent No. EP1084543 entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and Other Cryptosystems" – "Verwendung von Unvorhersagbarer Information zur Leckminimierung von Chipkarten und Anderen Kryptosystemen " – "Utilisation D'informations non Prévisible Pour Réduire au Maximum les Fuites Provenant des Cartes à Puces et Autres Systèmes Cryptographiques";
  41. German Patent No. EP1084543 entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and Other Cryptosystems" – "Verwendung von Unvorhersagbarer Information zur Leckminimierung von Chipkarten und Anderen Kryptosystemen " – "Utilisation D'informations non Prévisible Pour Réduire au Maximum les Fuites Provenant des Cartes à Puces et Autres Systèmes Cryptographiques";
  42. Great Britain Patent No. EP1084543 entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and Other Cryptosystems" – "Verwendung von Unvorhersagbarer Information zur Leckminimierung von Chipkarten und Anderen Kryptosystemen " – "Utilisation D'informations non Prévisible Pour Réduire au Maximum les Fuites Provenant des Cartes à Puces et Autres Systèmes Cryptographiques";
  43. Irish Patent No. EP1084543 entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and Other Cryptosystems" – "Verwendung von Unvorhersagbarer Information zur Leckminimierung von Chipkarten und Anderen Kryptosystemen " – "Utilisation D'informations non Prévisible Pour Réduire au Maximum les Fuites Provenant des Cartes à Puces et Autres Systèmes Cryptographiques";
  44. Netherlands Patent No. EP1084543 entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and Other Cryptosystems" – "Verwendung von Unvorhersagbarer Information zur Leckminimierung von Chipkarten und Anderen Kryptosystemen " – "Utilisation D'informations non Prévisible Pour Réduire au Maximum les Fuites Provenant des Cartes à Puces et Autres Systèmes Cryptographiques";
  45. Swiss Patent No. EP1084543 entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and Other Cryptosystems" – "Verwendung von Unvorhersagbarer Information zur Leckminimierung von Chipkarten und Anderen Kryptosystemen " – "Utilisation D'informations non Prévisible Pour Réduire au Maximum les Fuites Provenant des Cartes à Puces et Autres Systèmes Cryptographiques";
  46. European Patent Application No. 07075144.1 / EP1802024 entitled "Balanced Cryptographic Computational Method and Apparatus for Leak Minimization in Smartcards and other Cryptosystems" -- "Symmetrisches Kryptographisches Rechenverfahren und Vorrichtung zur Verlustminimierung bei Chipkarten und anderen Verschlüsselungssystemen" -- "Procédé Informatique Cryptographique Equilibré et Appareil pour Minimiser les Fuites Dans des Cartes Intelligentes et autres Systèmes de Chiffrage";
  47. European Patent Application No. 99951367.5 / EP1090480 entitled "Improved DES and Other Cryptographic Processes with Leak Minimization for Smartcards and Other Cryptosystems" -- "Verbessertes DES und andere Kryptographische Verfahren mit Verlustminimierung für Chipkarten und andere Verschlüsselungssysteme" – "DES Amélioré et autres Processus Cryptographiques avec une Minimisation de Pertes pour Cartes Intelligentes et autres Crypto-systèmes"; and
  48. Japanese Patent Application No. 2000-556475 (published as 2002-519722) entitled "Improved DES and Other Cryptographic Processes with Leak Minimization for Smartcards and other Cryptosystems";
  49. European Patent Application No. 08006143.5 / EP1933496 entitled "Improved DES and Other Cryptographic Processes with Leak Minimization for Smartcards and Other Cryptosystems" -- "Verbessertes DES und andere Kryptographische Verfahren mit Verlustminimierung für Chipkarten und andere Verschlüsselungssysteme" – "DES Amélioré et autres Processus Cryptographiques avec une Minimisation de Pertes pour Cartes Intelligentes et autres Crypto-systèmes";
  50. Japanese Patent No. 4216475 (Application No. 2000-558630, Publication No. 2002-520905) entitled "A Process and Device for Updating Leak Resistant Cryptographic Indexed Key";
  51. European Patent No. EP1691501 entitled "Leak-Resistant Cryptographic Method and Apparatus" -- "Leckresistentes Kryptographisches Verfahren und Vorrichtung" -- "Procède et Appareil Cryptographiques Résistant aux Fuites";
  52. French Patent No. EP1691501 entitled "Leak-Resistant Cryptographic Method and Apparatus" -- "Leckresistentes Kryptographisches Verfahren und Vorrichtung" -- "Procède et Appareil Cryptographiques Résistant aux Fuites";
  53. German Patent No. EP1691501 entitled "Leak-Resistant Cryptographic Method and Apparatus" -- "Leckresistentes Kryptographisches Verfahren und Vorrichtung" -- "Procède et Appareil Cryptographiques Résistant aux Fuites";
  54. Great Britain Patent No. EP1691501 entitled "Leak-Resistant Cryptographic Method and Apparatus" -- "Leckresistentes Kryptographisches Verfahren und Vorrichtung" -- "Procède et Appareil Cryptographiques Résistant aux Fuites";
  55. Netherlands Patent No. EP1691501 entitled "Leak-Resistant Cryptographic Method and Apparatus" -- "Leckresistentes Kryptographisches Verfahren und Vorrichtung" -- "Procède et Appareil Cryptographiques Résistant aux Fuites";
  56. Swiss Patent No. EP1691501 entitled "Leak-Resistant Cryptographic Method and Apparatus" -- "Leckresistentes Kryptographisches Verfahren und Vorrichtung" -- "Procède et Appareil Cryptographiques Résistant aux Fuites";
  57. Canadian Patent No. 2316227 entitled "Leak-Resistant Cryptographic Method and Apparatus" -- "Procede et Appareil Cryptographiques Resistant aux Fuites";
  58. European Patent No. EP1084548 entitled "Secure Modular Exponentiation with Leak Minimization for Smartcards and Other Cryptosystems" -- "Gesicherte Moduläre Potenzierung mit Leckminimierung für Chipkarten und andere Kryptosysteme" -- "Exponentiation Modulaire Securisée pour la Minimisation des Fuites Dans des Cartes à Puce et Autres Systemes Cryptographiques";
  59. Finland Patent No. EP1084548 entitled "Secure Modular Exponentiation with Leak Minimization for Smartcards and Other Cryptosystems" -- "Gesicherte Moduläre Potenzierung mit Leckminimierung für Chipkarten und andere Kryptosysteme" -- "Exponentiation Modulaire Securisée pour la Minimisation des Fuites Dans des Cartes à Puce et Autres Systemes Cryptographiques";
  60. French Patent No. EP1084548 entitled "Secure Modular Exponentiation with Leak Minimization for Smartcards and Other Cryptosystems" -- "Gesicherte Moduläre Potenzierung mit Leckminimierung für Chipkarten und andere Kryptosysteme" -- "Exponentiation Modulaire Securisée pour la Minimisation des Fuites Dans des Cartes à Puce et Autres Systemes Cryptographiques";
  61. German Patent No. EP1084548 entitled "Secure Modular Exponentiation with Leak Minimization for Smartcards and Other Cryptosystems" -- "Gesicherte Moduläre Potenzierung mit Leckminimierung für Chipkarten und andere Kryptosysteme" -- "Exponentiation Modulaire Securisée pour la Minimisation des Fuites Dans des Cartes à Puce et Autres Systemes Cryptographiques";
  62. Great Britain Patent No. EP1084548 entitled "Secure Modular Exponentiation with Leak Minimization for Smartcards and Other Cryptosystems" -- "Gesicherte Moduläre Potenzierung mit Leckminimierung für Chipkarten und andere Kryptosysteme" -- "Exponentiation Modulaire Securisée pour la Minimisation des Fuites Dans des Cartes à Puce et Autres Systemes Cryptographiques";
  63. Netherlands Patent No. EP1084548 entitled "Secure Modular Exponentiation with Leak Minimization for Smartcards and Other Cryptosystems" -- "Gesicherte Moduläre Potenzierung mit Leckminimierung für Chipkarten und andere Kryptosysteme" -- "Exponentiation Modulaire Securisée pour la Minimisation des Fuites Dans des Cartes à Puce et Autres Systemes Cryptographiques";
  64. Swiss Patent No. EP1084548 entitled "Secure Modular Exponentiation with Leak Minimization for Smartcards and Other Cryptosystems" -- "Gesicherte Moduläre Potenzierung mit Leckminimierung für Chipkarten und andere Kryptosysteme" -- "Exponentiation Modulaire Securisée pour la Minimisation des Fuites Dans des Cartes à Puce et Autres Systemes Cryptographiques"; and
  65. European Patent Application No. 08000796.6 / EP1926241 entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and other Cryptosystems" -- "Verwendung von Unvorhersagbarer Information zur Leckminimierung von Chipkarten und anderen Kryptosystemen" -- "Utilisation D'informations Imprévisibles pour Minimiser les Fuites de Cartes Intelligentes et autres Cryptosystèmes";
  66. European Patent Application No. 08075862.6 / EP2031792 entitled "Secure Modular Exponentiation with Leak Minimization for Smartcards and Other Cryptosystems" -- "Gesicherte Moduläre Potenzierung mit Leckminimierung für Chipkarten und andere Kryptosysteme" -- "Exponentiation Modulaire Securisée pour la Minimisation des Fuites Dans des Cartes à Puce et Autres Systemes Cryptographiques";
  67. Hong Kong Patent Publication No. 1116961A entitled "Improved DES and Other Cryptographic Processes with Leak Minimization for Smartcards and Other Cryptosystems";
  68. Hong Kong Patent Publication No. 1117291A entitled "Using Unpredictable Information to Minimize Leakage from Smartcards and other Cryptosystems"; and
  69. Hong Kong Patent Publication No. 1129005A entitled "Secure Modular Exponentiation with Leak Minimization for Smartcards and Other Cryptosystems".