http://Plasma.io 's "mass withdrawal" defense against block withholding is doomed: it loses the race against fraudulent fund withdrawal, and assuming a reliable way to honestly coordinate the masses is assuming away a bigger problem than the one solved. #Ethereum
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Interactive proofs cannot be done, much less in predictably finite time, when the good guys have to guess in a huge withheld block they can't see except by slow costly bytewise challenge which tiny part contains the fake data.
#Plasma1 reply 0 retweets 0 likesShow this thread -
Shared knowledge of the data is a prerequisite to fraud proof via verification games, and
@VitalikButerin 's exercise in trying to avoid extending the main chain's gossip network to include shared knowledge of the direct side-chains' data is inevitably futile.#Plasma1 reply 0 retweets 1 likeShow this thread
Example attack: I manage much more than my bond. I create a bad block with lots of tiny valid transactions from puppet accounts and one huge invalid transaction from UTXOs I don't own to my recipient account. I register the bad block then race to get that money out.
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