Vulnerabilities in the Adachi-Aoki-Komano-Ohta micropayment scheme

Kim M., Koc C. K.

International Journal of Network Security, vol.4, no.2, pp.235-239, 2007 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 4 Issue: 2
  • Publication Date: 2007
  • Journal Name: International Journal of Network Security
  • Journal Indexes: Scopus
  • Page Numbers: pp.235-239
  • Keywords: Electronic commerce, Impersonation, Micropayment, Payword, Replay attack
  • İstanbul Ticaret University Affiliated: Yes

Abstract

Rivest and Shamir presented two simple micropayment schemes, "PayWord" and "MicroMint," for making small purchases over the Internet [14]. Recently, Adachi et al. have pointed out that the PayWord scheme has two security problems, and proposed a new micropayment scheme to overcome these problems [1]. Nevertheless, we show that their protocol is still vulnerable to impersonation and replay attacks.