Asymmetric secret sharing scheme suitable for cloud systems

The asymmetric secret sharing scheme that we proposed at AINA2013 has a feature that reduces the required storage capacity of a specific server. This means that it can be used as the server not only for the entity of a cloud system but also for a device that is managed by a user, such as a smart phone. In this paper, first we propose a new method, which is an AINA method modified such that it is more suitable for application in a cloud system in which multiple users participate, and then, we propose an application to a life log, as an example of a specific application to which this method can be applied.