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GeneralRe: Software developers, you're better when you work together Pin
Kent Sharkey30-Mar-14 17:26
staffKent Sharkey30-Mar-14 17:26 
GeneralRe: Software developers, you're better when you work together Pin
wout de zeeuw31-Mar-14 0:07
wout de zeeuw31-Mar-14 0:07 
NewsFire hazard forces recall of Lenovo ThinkPad batteries Pin
Kent Sharkey30-Mar-14 12:21
staffKent Sharkey30-Mar-14 12:21 
NewsMicrosoft has big plans For Bing’s Entity Engine Pin
Kent Sharkey30-Mar-14 12:13
staffKent Sharkey30-Mar-14 12:13 
NewsUncle Bob throws his 2c into the Agile opinions pile Pin
Duncan Edwards Jones28-Mar-14 9:21
professionalDuncan Edwards Jones28-Mar-14 9:21 
GeneralRe: Uncle Bob throws his 2c into the Agile opinions pile Pin
PIEBALDconsult28-Mar-14 9:41
mvePIEBALDconsult28-Mar-14 9:41 
GeneralRe: Uncle Bob throws his 2c into the Agile opinions pile Pin
Marc Clifton30-Mar-14 13:02
mvaMarc Clifton30-Mar-14 13:02 
NewsThere was no widespread use of malleability attacks before the closure of MtGox Pin
Eric Goedhart27-Mar-14 14:02
professionalEric Goedhart27-Mar-14 14:02 
Quote:
(Submitted on 26 Mar 2014)

arxiv.org

In Bitcoin, transaction malleability describes the fact that the signatures that prove the ownership of bitcoins being transferred in a transaction do not provide any integrity guarantee for the signatures themselves. This allows an attacker to mount a malleability attack in which it intercepts, modifies, and rebroadcasts a transaction, causing the transaction issuer to believe that the original transaction was not confirmed. In February 2014 MtGox, once the largest Bitcoin exchange, closed and filed for bankruptcy claiming that attackers used malleability attacks to drain its accounts. In this work we use traces of the Bitcoin network for over a year preceding the filing to show that, while the problem is real, there was no widespread use of malleability attacks before the closure of MtGox.


Quote:


Bitcoin Transaction Malleability and MtGox (.pdf)

6 Conclusion
The transaction malleability problem is real and should be considered when implementing
Bitcoin clients. However, while MtGox claimed to have lost 850,000
bitcoins due to malleability attacks, we merely observed a total of 302,000 bitcoins
ever being involved in malleability attacks. Of these, only 1,811 bitcoins
were in attacks before MtGox stopped users from withdrawing bitcoins. Even
more, 78.64% of these attacks were ineffective. As such, barely 386 bitcoins
could have been stolen using malleability attacks from MtGox or from other
businesses. Even if all of these attacks were targeted against MtGox, MtGox
needs to explain the whereabouts of 849,600 bitcoins.

With friendly greetings,Smile | :)

Eric Goedhart

GeneralRe: There was no widespread use of malleability attacks before the closure of MtGox Pin
Chris Maunder27-Mar-14 14:16
cofounderChris Maunder27-Mar-14 14:16 
JokeRe: There was no widespread use of malleability attacks before the closure of MtGox Pin
Duncan Edwards Jones27-Mar-14 21:44
professionalDuncan Edwards Jones27-Mar-14 21:44 
NewsA beginner’s guide to contributing to open source Pin
Kent Sharkey27-Mar-14 13:27
staffKent Sharkey27-Mar-14 13:27 
NewsJustMock Lite just got even better Pin
Kent Sharkey27-Mar-14 13:20
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GeneralRe: JustMock Lite just got even better Pin
Pete O'Hanlon27-Mar-14 21:43
mvePete O'Hanlon27-Mar-14 21:43 
GeneralRe: JustMock Lite just got even better Pin
Kevin McFarlane28-Mar-14 1:32
Kevin McFarlane28-Mar-14 1:32 
GeneralRe: JustMock Lite just got even better Pin
Pete O'Hanlon28-Mar-14 1:33
mvePete O'Hanlon28-Mar-14 1:33 
GeneralRe: JustMock Lite just got even better Pin
Kevin McFarlane28-Mar-14 1:41
Kevin McFarlane28-Mar-14 1:41 
GeneralRe: JustMock Lite just got even better Pin
Pete O'Hanlon28-Mar-14 2:41
mvePete O'Hanlon28-Mar-14 2:41 
NewsResearchers replace one of yeast’s chromosomes with a synthetic one Pin
Kent Sharkey27-Mar-14 11:42
staffKent Sharkey27-Mar-14 11:42 
GeneralRe: Researchers replace one of yeast’s chromosomes with a synthetic one Pin
PIEBALDconsult27-Mar-14 11:55
mvePIEBALDconsult27-Mar-14 11:55 
NewsFacebook will deliver internet via drones with “Connectivity Lab” project powered by Acqhires from Ascenta Pin
Kent Sharkey27-Mar-14 11:07
staffKent Sharkey27-Mar-14 11:07 
NewsBringing the magic of Qt to Windows Runtime Pin
Kent Sharkey27-Mar-14 10:53
staffKent Sharkey27-Mar-14 10:53 
GeneralRe: Bringing the magic of Qt to Windows Runtime Pin
Rob Grainger27-Mar-14 23:37
Rob Grainger27-Mar-14 23:37 
NewsWe just learned Satya Nadella's master plan for Microsoft Pin
Kent Sharkey27-Mar-14 10:48
staffKent Sharkey27-Mar-14 10:48 
GeneralRe: We just learned Satya Nadella's master plan for Microsoft Pin
PIEBALDconsult27-Mar-14 11:19
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NewsStaff at Mozilla call for new CEO Brendan Eich to ‘step down’ Pin
Kent Sharkey27-Mar-14 9:42
staffKent Sharkey27-Mar-14 9:42 

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