Paper 2014/219
Dynamic Searchable Encryption via Blind Storage
Muhammad Naveed, Manoj Prabhakaran, and Carl A. Gunter
Abstract
Dynamic Searchable Symmetric Encryption allows a client to store a dynamic collection of encrypted documents with a server, and later quickly carry out keyword searches on these encrypted documents, while revealing minimal information to the server. In this paper we present a new dynamic SSE scheme that is simpler and more efficient than existing schemes while revealing less information to the server than prior schemes, achieving fully adaptive security against honest-but-curious servers. We implemented a prototype of our scheme and demonstrated its efficiency on datasets from prior work. Apart from its concrete efficiency, our scheme is also simpler: in particular, it does not require the server to support any operation other than upload and download of data. Thus the server in our scheme can be based solely on a cloud storage service, rather than a cloud computation service as well, as in prior work. In building our dynamic SSE scheme, we introduce a new primitive called Blind Storage, which allows a client to store a set of files on a remote server in such a way that the server does not learn how many files are stored, or the lengths of the individual files; as each file is retrieved, the server learns about its existence (and can notice the same file being downloaded subsequently), but the file’s name and contents are not revealed. This is a primitive with several applications other than SSE, and is of independent interest.
Metadata
- Available format(s)
- Publication info
- Preprint.
- Keywords
- searchable symmetric encryptionsecure cloud storageencrypted search
- Contact author(s)
- naveed2 @ illinois edu
- History
- 2014-03-27: received
- Short URL
- https://ia.cr/2014/219
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2014/219, author = {Muhammad Naveed and Manoj Prabhakaran and Carl A. Gunter}, title = {Dynamic Searchable Encryption via Blind Storage}, howpublished = {Cryptology {ePrint} Archive, Paper 2014/219}, year = {2014}, url = {https://eprint.iacr.org/2014/219} }