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In this paper, we focus on comparison between the complementary logics and masked logics as countermeasures against side channel attacks and we develop AES co-processors to which the countermeasures are applied for this purpose. To evaluate the difference that depends on target devices and process, the co-processors are mounted on 130 nm-ASIC, 90 nm-ASIC and FPGA. Through our performance and security...
In this study, we are focusing on the detailed control of the size and density of nanoparticles on the substrate by employing the gas-phase catalyst. To fabricate iron (Fe) nanoparticles as catalyst, Fe(CO)5 gas was used. Size and density of the nanoparticles can be controlled by varying the experimental parameters, such as the molar flow rate, the decomposition temperature and the flow time. Quartz...
In this paper we present a simple but powerful one-step growth method of ultra-long vertically aligned multi-walled CNT (MWNT) array, and its possible applications. Our growth method requires no additional process for catalyst thin film (pre-deposition), and only requires iron chloride powder and acetylene gas. We also present the results of electrical properties of MWNT array, such as electrical...
In this presentation, a facile method has been developed to produce large quantities of ZnO nanocrystals with hexagonal shape. In the presence of sodium bis (2-ethylexyl) sulfosuccinate (AOT) emulsions as a structure-direct agent, the reaction of hexamethylenetetramine (HMT) in Zn2+ aqueous solution forms ZnO phosphors. Second, both micro-sized and nano-sized platelet-like ZnO nanocrystals have been...
Field electron emission from silicon emitter is attractive one of electron source because not only it can be integrated with functional circuits, but also can be achieved high performance. The characteristic of field emission from silicon emitter, however, is different from metals: there is an obvious peak shift of the electron energy distribution (Si-EED) with external field. The surface states are...
In this paper, graphite nanospine cathode (GNS) were fabricated by plasma etching using microwave plasma CVD. In order to evaluate emission characteristics, a triode-type field emission X-ray tube was fabricated which was composed of GNS cathode, control electrode, and an anode. The anode current-voltage characteristics of X-ray tube was shown with respect to GNS cathode and control electrodes. This...
In this study, a spin-polarized electron source which can operate at room temperature is reported. <110>-oriented single crystal magnetite whiskers 30 to 200 nm in diameter were synthesized on a stainless steel plate by the combustion flame thermal oxidation process. Microscopic analyses revealed that the whiskers have some defects such as stacking faults and dislocations and also that manganese...
In 1950, E. W. Miiller reported firstly the very feature cloverleaf patterns, which were able to be observed in field emission microscope (FEM) by using many kinds of adsorbed organic small molecules on tungsten tip. Since this discovery till now days, many papers have been reported and several theories have been proposed to explain about these phenomena. Also, relatively complicated total electron...
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