Abstract
Due to the spread of new coronavirus infections, it is desirable to allow people to use public devices such as PIN type smart locks or vending machines without touching them directly. Therefore, we developed a method that enables contactless operation of various public devices using personal smartphones while reducing the impact on existing public devices. This method imitates chameleons of the animal. Therefore, we call it chameleon. We developed the chameleon based on Web application and applied it to PIN type smart locks. Then, we confirmed the effectiveness of the chameleon as the method of contactless operation.
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