Abstract: A method in a first device for anonymously delivering data to a part that has initiated a task is provided. The first device and the part initiating a task are participants in opportunistic sensing. The method comprises creating a data sample and encrypting the data sample with a public key of the task initiating part. After communicating the protected sample toone or more intermediate devices, one of the one or more intermediate devices delivers the protected sample to the task initiating part, such that the task initiating part does not know the identity of the first device. The task initiating device only know the identity of the one of the one or more intermediate devices that delivered the protected sample to the task initiating part, wherein the intermediate devices are participants in the opportunistic sensing.

Abstract: A service provider node (101), and a method therein, for transmitting data packets relating to parts of a service to a communication device (102). The service provider node and the communication device are communicatively connected over a communications network (104) and comprised in a communications system (100). The method comprises receiving (205, 302) a signal (S1), which signal comprises an identifier of the communication device requesting a service, an identifier of the requested service, and an agreement comprising information about a previously agreed part of the service. The method comprises further agreeing (303) on an upcoming part of the service requested by the communication device, while transmitting (206, 304) data packets relating to the previously agreed part of the service to the communication device, wherein the data packets are transmitted in dependence of the received signal.