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

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. © 2015 changsheng wan et al.