Finally! Real privacy for Bitcoin transactions from some Core developers

Greg Maxwell made a VERY exciting announcement for some real cutting edge stuff: a way to get full privacy with transactions in Bitcoin!

The great thing about this is, unlike ZCash, this new method:

  • Doesn't use untested new cryptography
  • Can be high performance (compared to alternatives)
  • Doesn't require a trusted setup
  • Doesn't break pruning

There is a video here that describes confidential transactions in more detail. But the exciting announcement today is a way to make confidential transactions work with a size overhead only 3 times that of normal transactions. When combined with the further privacy improvement of CoinJoin or ValueShuffle, there is virtually no size overhead and no trusted third party or sharing of private data is required!

Thank you Greg, Pieter, and other Core team contributors for this excellent work on confidential transactions, coinjoin, and working on the theory and engineering to bring this to Bitcoin! Exciting developments! Thanks also Benedikt Bünz, Jonathan Bootle for your discovery of BulletProofs and Dan Boneh, Andrew Poelstra for your work on this.

Update: As /u/pwuille pointed out, while the size overhead is 3X (or less per transaction w/ coinjoin), the CPU overhead for verification is still an order of magnitude higher than regular transactions. But we'll know more once they start working on an implementation.

submitted by /u/fortunative
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Message to Core: We need PoW Change. Now.

Whether it be for the S2X bullshit, or the fact that 90%+ of hashing power is centralized in the bitmain cartel, we need a PoW change that can sustain the effects of ASIC manufacturing. Equishash is NOT the answer, and Core's focus needs to be aimed at an ASIC resistant hashing function.

We now see the true effects of what a 51% attack could mean. A ASIC-resistant, or ASIC-impossible solution needs to be found. We're looking at having Bitcoin taken from beneath us if we don't act now. And this will NOT be the only attack we will see in this style. Core has a responsibility to Bitcoin to put their effort into this.

submitted by /u/GCXBit
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