EAN: 9783658071158

AUTHENTICATION IN INSECURE ENVIRONMENTS - SEBAS...

Sebastian Pape discusses two different scenarios for authentication. On the one hand  users
cannot trust their devices and nevertheless want to be able to do secure authentication. On the
other hand  users may not want to be tracked while their service provider does not want them to
share their credentials. Many users may not be able to determine whether their device is
trustworthy  i.e. it might contain malware. One solution is to use visual cryptography for
authentication. The author generalizes this concept to human decipherable encryption schemes
and establishes a relationship to CAPTCHAS. He proposes a new security model and presents the
first visual encryption scheme which makes use of noise to complicate the adversary's task. To
prevent service providers from keeping their users under surveillance  anonymous credentials
may be used. However  sometimes it is desirable to prevent the users from sharing their
credentials. The author compares existing approaches based on non-transferable anonymous
credentials and proposes an approach which combines biometrics and smartcards.

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