Scheme of real-time payments for SIP services based on a hash chain

Jianguo Hao, Jia Zou, Yiqi Dai

Research output: Contribution to journalArticlepeer-review


The problems with present payment schemes for SIP services are overcomed with a real-time payment scheme for SIP services based on hash chains, SIPCoin. SIPCoin takes advantage of the efficiency and irreversibleness of the hash chain to improve performance. The scheme uses a simple extension to SIP and a standard payment message flow integrated with the hash chain-based micro-payment mechanism, and the SIP session establishment and management process to realize secure real-time payments for SIP services. SIPCoin is more efficient, has better real-time performance and extensibility, and can secure electronic currency from forgery and thievery. The scheme can defend against the common attacks during payments for SIP services, such as replay and man-in-the-middle attacks.

Original languageEnglish (US)
Pages (from-to)581-585
Number of pages5
JournalQinghua Daxue Xuebao/Journal of Tsinghua University
Issue number4
StatePublished - Apr 2009
Externally publishedYes


  • Electronic payment
  • Hash chain
  • Real-time payment
  • SIP services

ASJC Scopus subject areas

  • General Engineering
  • Computer Science Applications
  • Applied Mathematics


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