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Cryptographically Secure Bloom-Filters

Ryo Nojima^(a),(*), Youki Kadobayashi^(b)

Transactions on Data Privacy 2:2 (2009) 131 - 139

Abstract, PDF

(a) National Institute of Information and Communications Technology (NICT); 4-2-1 Nukuikitamachi; Koganei; Tokyo 184-8795; Japan.

(b) Nara Institute of Science of Technology (NAIST); 8916-5 Takayamacho; Ikoma; Nara 630-0192; Japan.

e-mail:ryo-no @nict.go.jp;

Abstract

In this paper, we propose a privacy-preserving variant of Bloom-filters. The Bloom-filter has many applications such as hash-based IP-traceback systems and Web cache sharing. In some of those applications, equipping the Bloom-filter with the privacy-preserving mechanism is crucial for the deployment.

In this paper, we propose a cryptographically secure privacy-preserving Bloom-filter protocol. We propose such two protocols based on blind signatures and oblivious pseudorandom functions, respectively. To show that the proposed protocols are secure, we provide a reasonable security definition and prove the security.

^* Corresponding author.

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