GreHack'15 is over. Thanks everyone, that was awesome! See you next year.


November 20th, 2015 Grenoble, FRANCE
November 22nd, 2015
We are sorry to announce the end of GreHack'15. Thanks everyone for the great moment. Challenges and links for write-ups of CTF challenges will be added here. Remember, new is *not* always better. But sometimes it is. See you next year.

(Workshop) Drone
November 6th, 2015
Last but not least, we are glad to announce the forth workshop of GreHack 2015: Drone - and they shall fall from the sky. Come and learn how to inject traffic and take control of drones over the legitimate user. More information here.

(Invited talk) Draw me a Local Kernel Debugger
November 3rd, 2015
Let's talk about kernel debuggers. @w4kfu & hakril will be at GreHack 2015 to present their work. More information here.

November 1st, 2015
The GreHack 2015 CTF teaser is out ! Take a look and register here.

(Invited talk) LOGJAM
October 27th, 2015
GreHack 2015 will have the pleasure to welcome Emmanuel Thomé to talk about LOGJAM. More information here.

October 20th, 2015
We are glad to announce a third workshop! Guillaume Dedrie (Quarkslab) will present IRMA at GreHack 2015. More information here.

Program is out!
October 15th, 2015
This is it, the program for GreHack 2015 is finally out! Check it out here, and be ready to take your ticket. Registrations will be opened tomorrow around 2:30pm.

Miasm & Ivre
October 15th, 2015
Miasm and Ivre developpers (CEA) will propose a workshop as an introduction to their tools at GreHack 2015. More information here. Other workshops will be announced soon.

Keynote speaker
October 5th, 2015
GreHack 2015 keynote speech will be lectured by Philippe Biondi (Airbus Group). More information about Keynote and invited talks to come ...

CFP extended
August 27th, 2015
The Call For Paper deadline for submission has been reported to September 7th, 2015. You can submit your paper here. For any additional information, do not hesitate to contact

GreHack is back !
June, 2015
GreHack was missing last year, but GreHack is back ! More talks, more challenges and more free food ! The 3rd International Symposium on Research in Grey-Hat Hacking - aka GreHack - will be held in Grenoble, France on November 20th, 2015. It will, as always, gather researchers and practitioners from academia, industry, and government to discuss new advances in research related to any area of computer and information security.
Beware, old grehack website ( is NOT reliable anymore.
Valid urls are now,, .