To πανεπιστήμιο του Λουξεμβούργου δημοσιεύει έρευνα ανίχνευσης της ip των Bitcoin συναλλαγών

Το πανεπιστήμιο του Λουξεμβούργου κατά την διάρκεια του συνεδρίου ACM Conference on Computer and Communications Security  δημοσίευσε μέθοδο συσχετισμού των Bitcoin διευθύνσεων με τις ip όσων τις χρησιμοποιούν.

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.

Την έρευνα την υπογράφουν οι Alex Biryukov, Dmitry Khovratovich και Ivan Pustogarov από το τμήμα υπολογιστών και τεχνολογίας του πανεπιστημίου.

“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 an attacker wants to be.”

Ολόκληρη την μέθοδο που χρησιμοποιούν μπορείτε να την διαβάσετε εδώ

Μένει να δούμε ποια θα είναι η αντίδραση των core developer του Bitcoin πρωτοκόλλου ώστε να διορθώσουν αυτό το πρόβλημα.