Chapter

Towards Hardware-Intrinsic Security

Part of the series Information Security and Cryptography pp 367-386

Date:

Efficient Secure Two-Party Computation with Untrusted Hardware Tokens (Full Version)*

  • Kimmo JärvinenAffiliated withDepartment of Information and Computer Science, Aalto University
  • , Vladimir KolesnikovAffiliated withAlcatel-Lucent Bell Laboratories
  • , Ahmad-Reza SadeghiAffiliated withHorst Görtz Institute for IT Security, Ruhr-University Bochum
  • , Thomas SchneiderAffiliated withHorst Görtz Institute for IT Security, Ruhr-University Bochum Email author 

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Abstract

Secure and efficient evaluation of arbitrary functions on private inputs has been subject of cryptographic research for decades. In particular, the following scenario appears in a variety of practical applications: a service provider (server \(\mathcal{S}\)) and user (client \(\mathcal{C}\)) wish to compute a function f on their respective private data, without incurring the expense of a trusted third party. This can be solved interactively using Secure Function Evaluation (SFE) protocols, for example, using the very efficient garbled circuit (GC) approach [23, 36]. However, GC protocols potentially require a large amount of data to be transferred between \(\mathcal{S}\) and \(\mathcal{C}\). This is because f needs to be encrypted (garbled) as \(\widetilde{f}\) and transferred from \(\mathcal{S}\) to \(\mathcal{C}\).