From: David Wu <d...@cs.stanford.edu>
Securing Bitcoin wallets via threshold signatures
Arvind Narayanan
Friday, December 4, 2015
Talk at 4:15pm
Gates 463
Abstract:
The Bitcoin ecosystem has suffered frequent thefts and losses
affecting both businesses and individuals. Due to the irreversibility,
automation, and pseudonymity of transactions, Bitcoin currently lacks
support for the sophisticated internal control systems deployed by
modern businesses to deter fraud.
To address this problem, we present the first threshold signature
scheme compatible with Bitcoin’s ECDSA signatures and show how
distributed Bitcoin wallets can be built using this primitive. For
businesses, we show how our distributed wallets can be used to
eliminate single points of failure in flow of bitcoins through
the system. For individuals, we design, implement, and evaluate a
two-factor secure Bitcoin wallet.--
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