Paper 2017/679
Searchable Encryption with Access Control
Nils Löken
Abstract
Outsourcing data to the cloud is becoming increasingly prevalent. To ensure data confidentiality, encrypting the data before outsourcing it is advised. While encryption protects the secrets in the data, it also prevents operations on the data. For example in a multi-user setting, data is often accessed via search, but encryption prevents search. Searchable encryption solves this dilemma. However, in a multi-user setting not all users may be allowed to access all data, requiring some means of access control. We address the question how searchable encryption and access control can be combined. Combining these technologies is required to achieve strong notions of confidentiality: if a ciphertext occurs as a search result, we learn something about the underlying document, even if access control does not let us access the document. This illustrates a need to link search and access control, so that search results presented to users only feature data the users are allowed to access. Our searchable encryption scheme with access control establishes that link.
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. Major revision. 12th International Conference on Availability, Reliability and Security (ARES 2017)
- Keywords
- Searchable encryptioninverted indexaccess controlauthority key customizationmulti-authority ABE
- Contact author(s)
- nils loeken @ uni-paderborn de
- History
- 2017-07-18: received
- Short URL
- https://ia.cr/2017/679
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2017/679,
author = {Nils Löken},
title = {Searchable Encryption with Access Control},
howpublished = {Cryptology ePrint Archive, Paper 2017/679},
year = {2017},
note = {\url{https://eprint.iacr.org/2017/679}},
url = {https://eprint.iacr.org/2017/679}
}
