%0 Conference Paper %F Oral %T Interception and Furtivity of Digital Transmissions %+ Laboratoire d'Electronique et Systèmes de Télécommunications (LEST) %+ Université de Brest (UBO) %+ Extraction et Exploitation de l'Information en Environnements Incertains (E3I2) %+ Ecole Nationale Supérieure des Ingénieurs des Etudes et Techniques d'Armement (Ensieta) %A Burel, Gilles %A Quinquis, André %A Azou, Stéphane %F Invité %< avec comité de lecture %B IEEE-Communications 2002 %C Bucharest, Romania %8 2002-12-05 %D 2002 %K Digital transmissions %K Interception %K Time-frequency analysis %K Furtivity %K Chaos %K Spectrum surveillance %K Spread spectrum %K Unscented Kalman filters %Z Engineering Sciences [physics]/Signal and Image processing %Z Computer Science [cs]/Networking and Internet Architecture [cs.NI]Conference papers %X The development of digital communications creates new challenges for spectrum surveillance. Similarly, modern signal processing techniques and increasing available computational power make communication discretion ever more difficult. In this paper, we present recent methods based on time-frequency analysis and on statistical analysis of fluctuations, that are useful for detection and identification of transmissions in a non-cooperative context. Furthermore, promising research concerning the use of chaotic signals to develop furtive transmission systems is also presented. %G English %2 https://hal.science/hal-00518865/document %2 https://hal.science/hal-00518865/file/2002_12_comm_Intercept.pdf %L hal-00518865 %U https://hal.science/hal-00518865 %~ UNIV-BREST %~ ENSTA-BRETAGNE %~ CNRS %~ ENSTA-BRETAGNE-STIC %~ ENSIETA-E3I2