1. A computer controlled method for accumulating a historical context of changes for a device, comprising: maintaining on a receiving device a history of contextual changes; receiving, by the receiving device, a plurality of requests to perform operations that change a portion of a context associated with the receiving device, wherein each request is transmitted from one of a plurality of requester devices; verifying whether each requester device is authorized to perform the requested operation, comprising: applying a context access policy to each requester device; identifying those requester devices that satisfy the context access policy as authorized requester devices and performing the operation by changing the portion of the receiving device context associated with the request for each of the authorized requester devices; and identifying those requester devices that fail to satisfy the context access policy as unauthorized devices and denying the requests from the unauthorized requester devices; accreting the changed portions of the receiving device context with the history of contextual changes on the receiving device; accreting the denied requests of the unauthorized requester devices with the history of contextual changes; and storing the accreted history of contextual changes.