Partially blind signature is an extension of blind signature that allows a signer to sign a partially blinded message that include pre-agreed information such as expiry date or collateral conditions in the resulting signatures. It is more useful than blind signature in many applications, such as electronic cash (e-cash) system. Recently, Huang and Chang proposed a new design of efficient partially blind signature scheme. However, in this paper, we show that Huang-Chang partially blind signature scheme is not secure, this scheme does not meet the basic property of a partially blind signature, partial blindness: a malicious user (requester) can prepare a special public information a' and then remove the original information a from the signer's signature to obtain a signature with this special information. [All rights reserved Elsevier]
A smart home device control method, apparatus and device, and a non-volatile computer storage medium. The method comprises: acquiring input information input by a user based on a natural dialogue mode interface (S101); obtaining a control instruction for a smart home device according to the input information (S102); and sending the control instruction to the smart home device, so as to enable the smart home device to execute an operation according to the control instruction (S103). Due to the fact that a natural dialogue mode interface is adopted as the mode of interaction with a user, there is no need to display all controllable controls, of the smart home device provided by an application on a screen of a terminal. Therefore, the problem of increased data interaction between an application and a processing engine used by the application due to the limited display area of the terminal in the prior art can be avoided, and accordingly the processing burden of the processing engine is reduced.
A method for data management is provided. The method comprises : storing the plurality of items in a contiguous space within the memory, executing an instruction containing an address and a size that together identify the contiguous space to transmit the plurality of items from the main memory to a random-access memory (RAM) on a chip, and the chip includes a computing unit comprising a plurality of multipliers; and instructing the computing unit on the chip to: retrieve multiple of the plurality of items from the RAM; and perform a plurality of parallel operations using the plurality of multipliers with the multiple items to yield output data.
Abstract It is well known that CeO2 is a key commercial catalyst with a correlation to morphology and size, and the glow discharge electrolysis (GDE) is an advanced oxidation process to treat wastewater. In this article, CeO2 nanodots and shuttle-shaped rods were prepared by the sol–gel method and the homogeneous precipitation method, respectively. The average diameter of the nanodots is about 10 nm, while the diameters and the lengths of the rods are 500 nm and 1–5 μm. The effect of CeO2 sample on decoloration rate of methyl orange (MO) was investigated in the GDE system. Experimental results indicated that the decoloration rates of MO were increased after adding two kinds of CeO2 photocatalysts. Furthermore, the decoloration rates of MO catalyzed by shuttle-shaped CeO2 rods were higher than that catalyzed by CeO2 nanodots. It is demonstrated that UV-light generated in the process of GDE can activate CeO2 photocatalyst, and the morphology and size of CeO2 have influence on its catalytic performance. This method can be considered in the treatment of dye wastewater.
An object checking apparatus and method. The object checking apparatus includes one or more strengthen classifiers, every strengthen classifier includes one or more weak classifiers, every weak classifier includes a feature extraction unit and a function mapping unit, the feature extraction unit extracts the characteristic quantity of the image, the function mapping unit confirms the weak classify of the image according to the characteristic quantity extracted by the feature extraction unit. the feature extraction unit includes: a feature point extraction unit, extracting the predeterminate feature point pair combination from the image; a pixel value obtaining unit, obtaining the pixel value of every feature piont in the feature point pair combination; a feature piont comparing unit, comparing two feature pionts in every feature piont pair to obtain the logical value according to the pixel value obtained at the pixel value obtaining unit; and a feature quantity obtaining unit, confirming the feature quantity of the image according to the logical value.