Dear security community, Botconf 2013 - An international conference on the fight against botnets will take place on 5 & 6 December 2013 in Nantes, France. The preliminary programme has been published: https://www.botconf.eu/index.php/programme-preliminary/ (more to come: short talks, keynotes). Registration is now open: https://www.botconf.eu/index.php/registration/ Costs include access to the conference, lunches and coffee breaks and one reception dinner on the 5th of December. (Speakers receive a free full package, hotel and a speaker's dinner). We are looking forward to welcome you in Nantes in December. Nantes is easily accessible by plane or high-speed train (directly from Paris airports). For the organisation committee, -- Eric Freyssinet, Botconf Chair @Botconf - https://www.botconf.eu/