Patent ID: 7852775
Filing Date: 2010-12-14
Classification: H04L

Abstract:
1. Method for determining if an encrypted flow of packets (F) belongs to a predefined class of flows (ω t ), where said encrypted flow of packets (F) comprises an ordered sequence of authentication packets and data packets (Pkt i ), where each packet (Pkt i ) can be represented by at least two measurable variables (s,Δt), said method comprising the steps of: a) providing, for each packet position (i) in an ordered sequence of packets (Pkt b) measuring the values (s c) applying said measured values (s said steps b) and c) being applied to the data packets of the encrypted flow of packets (F), d) processing the sequence of values of probability density (p({right arrow over (x)}|ω e) comparing said reference value (S({right arrow over (x)}|ω