Problems on the MR micropayment schemes

  • Authors:

  • Masahiro Mambo;Moises Rosales Salinas;Kazuo Ohta;Noboru Kunihiro

  • Affiliations:

  • SIE, University of Tsukuba, Japan;IPN ESIME Culhuacan, Mexico;The University of Electro-Communications, Japan;The University of Electro-Communications, Japan

  • Venue:
  • ASIACCS '06 Proceedings of the 2006 ACM Symposium on Information, computer and communications security
  • Year:
  • 2006

  • Micropayments Revisited

    CT-RSA '02 Proceedings of the The Cryptographer's Track at the RSA Conference on Topics in Cryptology

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Abstract

We discuss the security of the MR schemes and especially point out the vulnerability of the MR3 scheme. The probabilistic deposit mechanism utilized in the MR3 scheme contributes to the reduction of the bank's processing cost. However, as shown in our paper, it also decreases the security of the entire scheme.