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
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Note: Some references added to bibliography.
Version: 20051122:221032 (All versions of this report)
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