A water repellent and oil resistant composition capable of imparting excellent water repellency and oil resistance to paper even under a condition of drying at a low temperature for a short time, is provided. A request for information is received from a request-generating element coupled to a browser associated with a client through the network. Another such method may include: encrypting a chunk of information according to a first symmetric key, the first symmetric key having been used in a previous and now-stopped connection-oriented session with a communication counterpart; and sending to a communication counterpart a first message whose payload at least in part the encrypted chunk of information. When any other user brings his device within discovery range of the WPS-enabled WAP, the WPS-enabled WAP sends, to that device, a list of the WAPs of which the WPS-enabled WAP is aware. An online training process is used in examples which enables knowledge to be propagated through the graphical data structure according to the hierarchical relations between features. Polarisers either side of the cell distinguish between the two switched states.