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Recently, a first step toward establishing foundations for group signatures was taken [5], with<lb>a treatment of the case where the group is static. However the bulk of existing practical schemes<lb>and applications are for dynamic groups, and these involve important new elements and security<lb>issues. This paper treats this case, providing foundations(More)
We identify and fill some gaps with regard to consistency (the extent to which false positives are produced) for public-key encryption with keyword search (PEKS). We define computational and statistical relaxations of the existing notion of perfect consistency, show that the scheme of Boneh et al. (Advances in Cryptology—EUROCRYPT 2004, ed. by C. Cachin, J.(More)
Longquan Zhou,1 Jiayi Xie,2 Weisen Shen,2 Yong Zheng,3 Yingjie Yang,4 Haixia Shi1 and Michael H. Ritzwoller2 1China Earthquake Network Center, China Earthquake Administration, Beijing, 100045 China. E-mail: lqzhou@seis.ac.cn 2Department of Physics, Center for Imaging the Earth’s Interior, University of Colorado at Boulder, Boulder, CO 80309, USA 3State Key(More)
In the motor systems driven by sinusoidal pulse width modulation (SPWM) threephase inverters, the peaks of common-mode (CM) voltage are so high that it will cause many negative effects. In this paper, a hybrid filter is presented to reduce the CM voltage (CMV) and the differentialmode (DM) harmonics in a three-phase inverter with carrier peak position(More)
In recent years, the detection of proteins by using bare graphene oxide (GO) to quench the fluorescence of fluorescein-labeled aptamers has been reported. However, the proteins can be adsorbed on the surface of bare GO to prevent the sensitivity from further being improved. In order to solve this problem, polyethylene glycol (PEG)-protected GO was used to(More)
Anonymity is one of the important services that must be available to users in the digital world as long as they behave honestly. Users’ communication must be kept authenticated and anonymous unless malicious behaviors are detected. In this case the accused user’s clear identity must be traced and revealed by the system to solve accusations. Enterprise(More)
Recently, graphene oxide (GO) has shown superiority for disease detection arising from its unique physical and chemical properties. However, proteins adsorbed on the surface of GO prevent sensitivity improvement in fluorescence-based detection methods. In this paper, a label-free method based on aptamer modified gold nanoparticles (GNPs) combined with Tween(More)
Magnesium alloy, a potential structural and biodegradable material, has been increasingly attracting attention. In this paper, two structures with enhanced light absorption on an AZ31B magnesium surface are fabricated by femtosecond laser texturing. Laser power and the number of laser pulses are mainly investigated for darkening effect. After irradiation,(More)
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