Does SegWit drop the security of Bitcoin down a notch?
Phil Champagne

Interesting article. I have a couple questions which I don’t know the answers too.

  • Would multisig coins also have the same risk?
  • Is there not a way to verify that the witness data is valid and not made up?
  • The attacks on SegWit I have seen require majority mining. How is that any different than bitcoin without SegWit?
  • Wouldn’t nodes tend to keep around the witness data for recent blocks and discard the witness data for older blocks. Does that not mitigate the risk some?
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