Abstract:
The present invention relates to a method of setting a communication channel to be used during a communication session, which is safe from attacks from outside, between a wireless universal serial bus (WUSB) host and a device, and, more specifically, to a method of setting a communication channel which can guarantee security against attacks from outside that can occur during a mutual authentication process between a host and a device required for setting the communication channel between the WUSB hose and the device. According to the disclosed method of setting a communication channel, values (messages) required for mutual authentication between a WUSB host and a device needed to set a communication channel to be used during a predetermined communication session between the host and the device are encrypted by both each of the host and the device and exchanged between the host and the device, an encryption key for encryption is not exchanged between the host and the device and stored on each of the host and the device, a session key to be used during the session is preliminarily stored on each of the host and the device, and each of the generated session keys is not exchanged between the host and the device, and rather confirmed based on the encrypted and exchanged values to be stored on each of the host and the device, thereby resolving tasks of the present invention.
Abstract:
본 발명은 일산화탄소의 산화 반응에 활성을 보이는 산화구리 및 열과 수분에 안정한 알루미나를 사용하는 기존의 연구에서 한 단계 발전하여, 산소의 이동을 활발하게 유도하여 산화 반응의 활성을 향상시키는 지르코늄 산화물 및 주석 산화물을 산화구리/알루미나 촉매에 첨가하여 보다 높은 활성을 가지는 일산화탄소의 선택적 산화반응 촉매 및 이의 제조방법에 관한 것이다. 본 발명의 일산화탄소의 선택적 산화반응을 위한 촉매는 산화구리/알루미나 촉매에 지르코늄 산화물 및 주석 산화물을 첨가한 것을 제조된다. 특히, 지르코늄 전구체와 주석 전구체를 용매에 각각 용해시키고 알루미나를 넣어 초기 함침법을 이용하여 알루미나 담체를 제조하는 단계와; 상기 알루미나 담체를 구리 전구체가 용해된 반응액에 넣고 함침시키는 단계를 포함하는 것을 특징으로 한다. 일산화탄소, 산화반응 촉매, 산화구리 알루미나 촉매, 지르코늄 전구체, 주석 전구체, 구리 전구체
Abstract:
PURPOSE: A cupric oxide/alumina composite catalyst for the selective oxidation of carbon monoxide and a manufacturing method thereof are provided to improve the catalyst activity converting the carbon monoxide into carbon dioxide by guiding the movement of oxygen. CONSTITUTION: A cupric oxide/alumina composite catalyst for the selective oxidation of carbon monoxide includes zirconium oxide and tin oxide. The amount of the zirconium oxide and the tin oxide is 1-10 weight% based on total weight. A manufacturing method of the composite catalyst includes the following steps: dissolving a zirconium precursor and a tin precursor in a solvent; manufacturing an alumina support by using an initial impregnation method; and dipping the alumina carrier in a reaction liquid.