bitcoin tor anonymity
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Anonymity on Bitcoin and TorMatt Corallo
April 1, 2013
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Bitcoin?
A Decentralized Anonymous Cryptocurrency
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Bitcoin?
A Decentralized Anonymous Cryptocurrency
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Bitcoin?
A Decentralized Anonymous Cryptocurrency
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Bitcoin?
A Decentralized Anonymous Cryptocurrency
A Decentralized Pseudonymous Digital Commodity
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Decentralized
No central authority
Double-spend problem
Alice
Bob
Hat Guy
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Decentralized
Blockchain!
Hard to generate (cost power)
Most work wins
Transaction confirmed in blocks
Miners generate blocks get Bitcoin
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Decentralized
Who enforces the rules?
What are the rules?
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Pseudonymous
Not so anonymous when you post your address
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Pseudonymous
Blockchain is Public
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Pseudonymous
How do you get money into Bitcoin?
Online Exchange
Physical Exchange
Transaction origination
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RFC 1149
IP-over-Avian Carriers
Due to high latency, UDP provides higher throughput
Built-in source and timestamp obscurity
Audit trails could be problematic
Crossing large bodies of water may help
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Tor
Designed to provide anonymity to anyone online
Routes traffic through the network randomly
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Tor
Really anonymous?
Control the whole network?
10%
not all that much
Packet timing?
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Silk Road
Seriously, you think this is anonymous?
You provided a physical mailing address
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Is it possible?
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Is Bitcoin ideal for Illegal Activities?
Bitcoin is the underlying currency/commodity NOT a bank
Is cash anonymous?