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Household energy monitoring via smart-meters motivates the problem of disaggregating the total energy usage signal into the component energy usage and operating patterns of individual appliances. While energy disaggregation enables useful analytics, it also raises privacy concerns because sensitive household information may also be revealed. Our goal is to preserve analytical utility while mitigating...
Cancelable biometrics is known as a template protection approach, and concrete protocols with high accuracy and efficiency have been proposed. Hattori et al. proposed provably-secure cancelable biometric authentication protocols based on somewhat homomorphic encryption (Journal on Information Processing, 2012). In AINA2014, under abnormal but feasible parameter settings, Izu et al. showed a spoofing...
We propose a new type of hidden vector encryption (HVE) schemes that we call a ciphertext-policy delegatable hidden vector encryption (CP-dHVE) scheme. Several HVE or delegatable HVE schemes have already been proposed and used for achieving searchable encryption which is capable of conjunctive, subset, and range queries on ciphertexts. Those schemes, however, could be categorized as key-policy HVEs...
Hattori et al. proposed provably-secure cancelable biometric authentication protocols based on homomorphic encryption such as the Boneh-Goh-Nissim encryption scheme or the Okamoto-Takashima encryption scheme (Journal on Information Processing, 20(2):496–507, 2012). However, their protocols have a security issue that the replay attack is applicable. In this paper, we propose a variant of the Hattori...
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