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Method of establishing the trustworthiness level of a participant in a communication connection

  • US 7,134,024 B1
  • Filed: 11/23/1998
  • Issued: 11/07/2006
  • Est. Priority Date: 07/15/1998
  • Status: Expired due to Term
First Claim
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1. Method of establishing a trustworthiness level (TL) of a participant (2) in a communication connection between a first communication partner (1) and a second communication partner (3) and for adapting communication behaviour to the established trustworthiness level (TL), whereby said participant (2) is equipped with a trustworthiness certificate (6) and a therefrom separated securely stored participant private key (8) and that said first communication partner (1) receives said trustworthiness certificate (6) from said participant (2), wherefrom said trustworthiness level (TL) is derived and established and said first communication partner (1) tests whether said trustworthiness certificate (6) belongs to said participant (2) using said participant private key (8) and that in case said trustworthiness certificate (6) is confirmed by said test to belong to said participant (2), said first communication partner (1) communicates said established trustworthiness level (TL) to said second communication partner (3) and that at least one parameter of said communication behaviour is chosen in dependence of said established trustworthiness level (TL), characterized in that the first communication partner (1) communicates the established trustworthiness level (TL) to the second communication partner (2) by piggybacking a trustworthiness level information (TLT) onto a communication message, signing said communication message with a first-partner private key (13) and sending it to said second communication partner (3).

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