Improving Privacy & Security in PPMA -ABE

Authors(3) :-M. Chinnasamy, S. Gandhimathi, Dr. V. Baby Deepa

In previous privacy-preserving multiauthority attribute-based encryption (PPMA-ABE) schemes, a user can acquire secret keys from multiple authorities with them knowing his/her attributes and furthermore, a central authority is required. Notably, a userís identity information can be extracted from his/her some sensitive attributes. Hence, existing PPMA-ABE schemes cannot fully protect usersí privacy as multiple authorities can collaborate to identify a user by collecting and analyzing his attributes. Moreover, ciphertext-policy ABE (CP-ABE) is a more efficient public-key encryption, where the encryptor can select flexible access structures to encrypt messages. Therefore, a challenging and important work is to construct a PPMA-ABE scheme where there is no necessity of having the central authority and furthermore, both the identifiers and the attributes can be protected to be known by the authorities. In this paper, a privacy-preserving decentralized CP-ABE (PPDCP-ABE) is proposed to reduce the trust on the central authority and protect usersí privacy. In our PPDCP-ABE scheme, each authority can work independently without any collaboration to initial the system and issue secret keys to users. Furthermore, a user can obtain secret keys from multiple authorities without them knowing anything about his global identifier and attributes.

Authors and Affiliations

M. Chinnasamy
Computer Science & Application, PGP College of Arts & Science, Namakkal, Tamilnadu, India
S. Gandhimathi
Asst. Prof & HOD, Computer Science & Application, PGP college of Arts & Science, Namakkal, Tamilnadu, India
Dr. V. Baby Deepa
Asst.Prof in Research Department of Computer Science, Govt. Arts College (Autonomous), karur-5, Tamilnadu, India

CP-ABE, Decentralization, Privacy.

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Publication Details

Published in : Volume 3 | Issue 6 | September-October 2017
Date of Publication : 2017-10-31
License:  This work is licensed under a Creative Commons Attribution 4.0 International License.
Page(s) : 767-778
Manuscript Number : IJSRSET1736192
Publisher : Technoscience Academy

Print ISSN : 2395-1990, Online ISSN : 2394-4099

Cite This Article :

M. Chinnasamy, S. Gandhimathi, Dr. V. Baby Deepa, " Improving Privacy & Security in PPMA -ABE, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 6, pp.767-778, September-October-2017.
Journal URL : http://ijsrset.com/IJSRSET1736192

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