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Deanonymisation of clients in Bitcoin P2P network
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cypherpunkare Offline
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#1
Deanonymisation of clients in Bitcoin P2P network
Något beklämmande.

Date: Thu, 27 Nov 2014 03:13:09 -0500
From: grarpamp <grarpamp@gmail.com>
To: cypherpunks@cpunks.org
Cc: tor-talk@lists.torproject.org
Subject: Deanonymisation of clients in Bitcoin P2P network

http://orbilu.uni.lu/handle/10993/18679
Biryukov, Khovratovich, Pustogarov
Nov-2014

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 transaction unlinkability.
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. We propose several countermeasures to mitigate these new
attacks.
2014-11-27, 15:35
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niklaswik Offline
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#2
RE: Deanonymisation of clients in Bitcoin P2P network
Det är en farlig värld där ute... Flera murar behövs om man vill vara säker.

“One has a moral responsibility to disobey unjust laws.” 
― Martin Luther King Jr.
2014-11-27, 16:01
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0xD15EA5E Offline
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#3
RE: Deanonymisation of clients in Bitcoin P2P network
Någon som läst det? 15 sidor i IEEE-format är lite off putting. Angel
2014-11-27, 23:05
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