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Searchable encryption revisited: Consistency properties, relation to anonymous IBE, and extensions. (English) Zbl 1145.94430
Shoup, Victor (ed.), Advances in cryptology – CRYPTO 2005. 25th annual international cryptology conference, Santa Barbara, CA, USA, August 14–18, 2005. Proceedings. Berlin: Springer (ISBN 3-540-28114-2/pbk). Lecture Notes in Computer Science 3621, 205-222 (2005).
Summary: We identify and fill some gaps with regard to consistency (the extent to which false positives are produced) for public-key encryption with keyword search (PEKS). We define computational and statistical relaxations of the existing notion of perfect consistency, show that the scheme of [D. Boneh, G. Di Crescenzo, R. Ostrovsky and G. Persiano, “Public key encryption with keyword search”, Lect. Notes Comput. Sci. 3027, 506–522 (2004; Zbl 1122.68424)] is computationally consistent, and provide a new scheme that is statistically consistent. We also provide a transform of an anonymous IBE scheme to a secure PEKS scheme that, unlike the previous one, guarantees consistency. Finally we suggest three extensions of the basic notions considered here, namely anonymous HIBE, public-key encryption with temporary keyword search, and identity-based encryption with keyword search.
For the entire collection see [Zbl 1131.94006].

MSC:
94A60 Cryptography
94A62 Authentication, digital signatures and secret sharing
68P25 Data encryption (aspects in computer science)
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