Università Degli Studi Di Brescia

Manuel Crotti

Luca Salgarelli

Maurizio Dusi

Francesco Gringoli

A method to determine if an encrypted flow of packets (F) belongs to a predefined class of flows (&#x3c9;), comprises the steps of giving probability density functions (p(x|&#x3c9;)) of the values of two measurable variables in a plurality of encrypted flows of packets (F) belonging to the predefined class of flows (&#x3c9;), measuring the values (s,&#x394;t) of the two measurable variables, apply the measured values (s,&#x394;t) to the probability density functions (p(x|&#x3c9;)) to generate a sequence of values of probability density (p({right arrow over (x)}|&#x3c9;)), process the sequence of values of probability density (p({right arrow over (x)}|&#x3c9;)) to generate a reference value (S({right arrow over (x)}|&#x3c9;)), and compare such reference value (S({right arrow over (x)}|&#x3c9;)) to a threshold value (T) to determine whether the encrypted flow of packets (F) belongs to the predefined class of flows.

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Mazzano, Italy

Manuel Crotti