On Monday 27-October at 10:30 in E112 (campus Kirchberg) Ivan Pustogarov will give a talk on:
Bitcoin is a digital currency which relies on a distributed set of miners
to mint coins and on a peer-to-peer network to broadcast transactions. The
identities of Bitcoin users are hidden behind pseudonyms (public keys)
which are recommended to be changed frequently in order to increase
We present an efficient method to deanonymize Bitcoin users, which allows
to link user pseudonyms to the IP addresses where the transactions are
generated. Our techniques work for the most common and the most
challenging scenario when users are behind NATs or firewalls of their ISPs.
They allow to link transactions of a user behind a NAT and to distinguish
connections and transactions of different users behind the same NAT. We
also show that a natural countermeasure of using Tor or other anonymity
services can be cut-off by abusing anti-DoS countermeasures of the Bitcoin
network. Our attacks require only a few machines and have been
experimentally verified. The estimated success rate is between 11% and 60%
depending on how stealthy the attacker wants to be. We propose several
countermeasures to mitigate these new attacks.
Joint work with Alex Biryukov and Dmitry Khovratovich, to be presented at ACM Conference on Computer and Communications Security (CCS) in November this year.
For those who happen to be in the area I will be presenting a talk on “Gamifying the Daily Commute” at the Precourt Energy Efficiency Centre (PEEC) at Stanford University on the 14th of November at 2.30pm. My thanks to the staff at PEEC for inviting me to present at their regular departmental seminar. The event is open to all those with an interest in the topic, so please check out their website if you would like to come along.
The seminar is part of a series of their 2014 Sustainable Transportation Seminars.
I will be attending NordiCHI 2014 in Helsinki this year along with colleagues from the UK and here in Luxembourg to present work. First up will be work undertaken by Saeed Afshari an MSc student here at The University of Luxembourg who has been exploring different interaction paradigms (including using a magnetic device) across different mobile game genres. Saeed is supervised by Andrei Popleteev, Thomas Engel and myself and I am delighted to say we believe that he is the first MSc student to travel to a conference with an accepted publication in our research group (perhaps even the whole centre). I am also involved in paper which explores auditory aspects of autonomous vehicles, this work is being undertaken by David Beattie who is a PhD student at Glasgow Caledonian University. I am one of his co-supervisors. Pre-prints of the papers will be available shortly both here and via my official university publications page.
After a discussion some months ago with Teufel who make the Raumfeld streaming systems they have finally made all devices in this range Spotify compatible. What’s more it even works in Luxembourg. This was previously a problem with other services which were on their Connector 2 such as WIMP, Napster and Simfy which while available on other devices remained inaccesible in Luxembourg. Annoyingly, many of the streaming providers only licence their platforms to the hardware vendors on a per territory basis. Sadly though Qobuz which provides CD quality streaming as I believe WIMP does too is still not available in Luxembourg on Raumfeld devices- although there is a rather inconvenient way round this.
Sadly if you want Evernote to work on Linux you may have to stick with the web version. After updating Evernote to the latest version on Linux (Mint 13) it has ceased to work which is very frustrating.
You can find my earlier article with a version which works here.