@InProceedings {cdfjps-esorics2009,
    author = {V. Ciriani and S. {De Capitani di Vimercati} and S. Foresti and S.
Jajodia and S. Paraboschi and P. Samarati},
    booktitle = {Proc. of the 14th European Symposium On Research In Computer Security (ESORICS 2009)},
    title = {Keep a Few: Outsourcing Data while Maintaining Confidentiality},
    address = {Saint Malo, France},
    month = {September},
    day = {21-25},
    year = {2009}
}