University of Illinois Urbana-Champaign

A Generalized Honest-But-Curious Trust Negotiation Strategy for Harvesting Credentials

Olson, Lars E.; Rosulek, Michael J.; Winslett, Marianne

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A Generalized Honest-But-Curious Trust Negotiation Strategy for Harvesting Credentials.pdf

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https://hdl.handle.net/2142/11381

Description

Title
A Generalized Honest-But-Curious Trust Negotiation Strategy for Harvesting Credentials
Author(s)
  • Olson, Lars E.
  • Rosulek, Michael J.
  • Winslett, Marianne
Issue Date
2007-08
Keyword(s)
computer security
Date of Ingest
2009-04-22T16:35:58Z
Abstract
Need-to-know is a fundamental security concept: a party should not learn information that is irrelevant to its mission. In this paper we show that during a trust negotiation in which parties show their credentials to one another, an adversary Alice can systematically harvest information about all of a victim Bob.s credentials that Alice is entitled to see, regardless of their relevance to a negotiation. We prove that it is not possible to enforce need-to-know conditions with the trust negotiation model and protocol developed by Yu, Winslett, and Seamons. We also present examples of similar need-to-know attacks with the trust negotiation approaches proposed by Bonatti and Samarati, and by Winsborough and Li. Finally, we propose possible countermeasures against need-to-know attacks, and discuss their advantages and disadvantages.
Type of Resource
text
Genre of Resource
Technical Report
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http://hdl.handle.net/2142/11381
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