Are sigs in the witness data immune from malicious tx via lots of sigs?
I think they are since the transaction is hashed differently if the transaction uses witnesses. The different hashing method allows for faster hashes by using midstates which can be reused for every signature verification.
well that's good, but would be nice to see it explicitly instead of having to assume.
oh, thanks for the URL about segwit implementation, that helped me understand it a lot better
James