Cryptology ePrint Archive: Report 2005/417

Correlation-Resistant Storage via Keyword-Searchable Encryption

Lucas Ballard and Matthew Green and Breno de Medeiros and Fabian Monrose

Abstract: We consider the problem of using untrusted components to build correlation-resistant survivable storage systems that protect file replica locations, while allowing nodes to continuously re-distribute files throughout the network. The principal contribution is a chosen-ciphertext secure, searchable public key encryption scheme which allows for dynamic re-encryption of ciphertexts, and provides for node-targeted searches based on keywords or other identifiers. The scheme is provably secure under the SXDH assumption which holds in certain subgroups of elliptic curves, and a closely related assumption that we introduce.

Category / Keywords: public-key cryptography / anonymity, searchable encryption, bilinear maps

Date: received 18 Nov 2005, last revised 22 Nov 2005

Contact author: mgreen at cs jhu edu

Available format(s): Postscript (PS) | Compressed Postscript (PS.GZ) | PDF | BibTeX Citation

Note: Some references added to bibliography.

Version: 20051122:221032 (All versions of this report)

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