Contextual biometric-based authentication for ubiquitous services

Ileana Buhan, Gabriele Lenzini, Saša Radomirović

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We introduce and comment on the concept of contextual pseudo identity. A contextual pseudo identity is a soft identity token that is built from both a user’s biometric and the context. When it comes to ubiquitous authentication, a contextual pseudo identity promises better security than that offered by traditional biometrics-based identity tokens: the use of context improves the tokens’ disposability and renewability, which are two essential properties in the protection of a user’s real identity. Our algorithm for generating contextual pseudo identities extends a Fuzzy Embedder so that it accepts both biometric and context-dependent input. We prove that our way of processing the context preserves the security and reliability properties of the Fuzzy Embedder used in our extension. An example shows how a user can utilize contextual pseudo identity to authenticate to and access ubiquitous services.

Original languageEnglish
Title of host publicationUbiquitous Intelligence and Computing
Subtitle of host publicationUIC 2010
EditorsZhiwen Yu, Xingshe Zhou, Ramiro Liscano, Daqing Zhang, Guanling Chen
Number of pages14
ISBN (Electronic)9783642163555
ISBN (Print)9783642163548
Publication statusPublished - 2010
Event7th International Conference on Ubiquitous Intelligence and Computing 2010 - Xian, China
Duration: 26 Oct 201029 Oct 2010

Publication series

NameLecture Notes in Computer Science
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference7th International Conference on Ubiquitous Intelligence and Computing 2010
Abbreviated titleUIC 2010


  • Biometrics
  • Context-aware authentication
  • Fuzzy embedder
  • Ubiquitous services

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)


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