DPA Countermeasures by Improving the Window Method

  • Authors:
  • Kouichi Itoh;Jun Yajima;Masahiko Takenaka;Naoya Torii

  • Affiliations:
  • -;-;-;-

  • Venue:
  • CHES '02 Revised Papers from the 4th International Workshop on Cryptographic Hardware and Embedded Systems
  • Year:
  • 2002

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Abstract

We propose three differential power analysis (DPA) countermeasures for securing the public key cryptosystems. All countermeasures are based on the window method, and can be used in both RSA and elliptic curve cryptosystems (ECC). By using the optimal countermeasure, performance penalty is small. In comparison with k-ary method, computation time of our countermeasure is only 105% in 1024-bit RSA and 119% in 160-bit ECC.