Part of the SpringerBriefs in Computer Science book series (BRIEFSCOMPUTER)


This chapter concludes the book by summarizing the main challenges faced by developers of distributed context-aware systems regarding scalability and privacy: (i) efficient and scalable context propagation and (ii) privacy control. The concept of aggregation appears as a result of the inference step, which effectively aggregates raw sensed data into high-level context information, and also appears as an option in push-based systems with delayed updates—since there is a delay, accumulated context data can be aggregated before it is transmitted. Although in different times on the context life cycle, these two types of aggregation achieve the same two important results: reduce the volume of information (an efficient solution to propagation of large volumes of information) and transform information (a practical solution to many privacy problems).


Context Information Virtual Sensor Proxy Cache Privacy Control Inference Step 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 6.
    Alves, P., Ferreira, P.: Reconmuc: adaptable consistency requirements for efficient large-scale multi-user chat. In: Proceedings of the ACM 2011 Conference on Computer Supported Cooperative Work, CSCW ’11, pp. 553–562. ACM, New York (2011). doi:10.1145/1958824.1958909.
  2. 28.
    Consolvo, S., Smith, I.E., Matthews, T., LaMarca, A., Tabert, J., Powledge, P.: Location disclosure to social relations: why, when, and what people want to share. In: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, CHI ’05, pp. 81–90. ACM, New York (2005). doi:10.1145/1054972.1054985.
  3. 72.
    Raento, M., Oulasvirta, A., Petit, R., Toivonen, H.: Contextphone: a prototyping platform for context-aware mobile applications. IEEE Pervasive Comput. 4(2), 51–59 (2005). doi:10.1109/MPRV.2005.29CrossRefGoogle Scholar

Copyright information

© The Author(s) 2014

Authors and Affiliations

  1. 1.INESC ID, Instituto Superior TécnicoUniversidade de LisboaLisboaPortugal

Personalised recommendations