I think we have been informed about the products before KDDI, and this is one of the research and development departments. In other words, it is still a concept, and have no idea when it will be launched.
Name:  KDDI Gesture-based verification structure.jpg
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So what is this thing fine in the new development? A gesture-based authentication system that allows users to access their personal mobile account with nothing more than a shake. Thus, a vibration. Apparently, a special sensor can analyze your muscular structure, movement patterns, the length of one arm of the user, and can somehow get an ID on it.

The technology is far from perfect, as reports have indicated that this method of authentication has a 4 percent failure rate. In all honestly, I think a low level of error that is good enough, but apparently not good enough for the world of business. I am sure that standards are higher.