An example operation may include one or more of registering a first service node and a second service node for accessing a common data store, providing to the second client node, by the first client node, a data access request token key and a data access receipt key corresponding to a data access request, responsive to a receipt of the access request token key and the data access receipt key by the second service, retrieving a result from the common data store; and providing the result to the second client node.