[Updated on Apr. 18] Integration of CiNii Articles into CiNii Research

Solutions to Security Problems of Rivest and Shamir's PayWord Scheme

Search this article

Abstract

The Pay Word Scheme, invented by Rivest and Shamir, is an efficient micropayment scheme utilizing a hash function. We point out that the scheme has the following problem : a malicious customer can damage the bank by purchasing in excess of the customer's credit which the bank has guaranteed by issuing a certificate. Generally, there are two positions of the bank with regard to the certificate. Position 1 : the bank takes full responsibility for the certificate and compensates all payments created by the customer's purchases ; and Position 2 : the bank does not redeem payments exceeding a limit set for the customer and shares the loss with the shop if trouble occurs. In the Pay Word Scheme, the bank can reduce its risk by adopting Position 2 rather than Position 1. However, this paper points out that the bank can damage the shop in Position 2 by impersonating an imaginary customer and making the shop share the loss with the bank. We propose a micropayment scheme (countermeasure) that overcomes these problems.

Journal

  • IEICE Transactions, A

    IEICE Transactions, A 88 (1), 195-202, 2005-01-01

    The Institute of Electronics, Information and Communication Engineers

Citations (3)*help

See more

References(13)*help

See more

Related Articles

See more

Related Data

See more

Related Books

See more

Related Dissertations

See more

Related Projects

See more

Related Products

See more

Details

  • CRID
    1572824502324587520
  • NII Article ID
    110003213226
  • NII Book ID
    AA10826239
  • ISSN
    09168508
  • Text Lang
    en
  • Data Source
    • CiNii Articles

Report a problem

Back to top