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Journal of Sensors
Volume 2015, Article ID 570185, 9 pages
Research Article

PKDIP: Efficient Public-Key-Based Data Integrity Protection for Wireless Image Sensors

1School of Information Science and Engineering, Southeast University, Nanjing, Jiangsu 210096, China
2The Third Research Institute of Ministry of Public Security, Shanghai 201204, China
3Accounting Department, Nanjing University, Nanjing, Jiangsu 210093, China

Received 23 April 2015; Accepted 11 June 2015

Academic Editor: Jian-Nong Cao

Copyright © 2015 Changsheng Wan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Due to limited energy of “wireless image sensors (WISs),” existing data integrity protection mechanisms typically employ a hash-function-based signing algorithm to generate “message authentication codes (MACs)” for long image frames. However, hash-function-based signing algorithm requires the WIS and the “end user (EU)” sharing a secret, which leads to a new security issue: Once the EU becomes malicious due to some reasons, it will be able to forge the WIS’s data since it holds the shared secret. Therefore, public-key cryptography is desirable. Unfortunately, public-key cryptographic operations are quite time-consuming for energy-restrained WISs. Facing this dilemma, we present a novel data integrity protection protocol named PKDIP in this paper. Similar to the mechanisms of this field, PKDIP generates MACs for data integrity protection. However, different from other well-known approaches, PKDIP introduces the “Montgomery Modular Multiplication (MontMM)” technique to current public-key-based signing algorithms. Since MontMM is much more efficient than hash functions, PKDIP can reduce the signing cost significantly. Experimental results show PKDIP can even be more efficient than hash-function-based schemes.