Bitcoin Eyes Zcash-Style Privacy
Researchers published a proposal to bring Zcash-style shielded privacy to Bitcoin without changing consensus rules, with verification of private payments performed by pool users' software rather than the network, per CoinDesk. Analysts cited in coverage are split, with some calling the approach highly experimental. No mechanism yet exists to move real BTC in or out. The proposal joins the Citrea-Crest acquisition among Bitcoin privacy-layer initiatives this week.
Shielded Bitcoin: Bitcoin doesn't verify its own privacy
The clever bit in this proposal is also the scary bit.
To hide the amount, sender and recipient of a Bitcoin payment without changing Bitcoin's rules, the researchers move the checking off Bitcoin entirely.
Bitcoin still records the encrypted payment. But the network no longer verifies it. Everyone using the private pool has to run separate checking software themselves — or risk being cheated.
So a Bitcoin transaction can confirm while the private payment tucked inside it is invalid. Confirmation and validity become two different facts.
That's a strange thing to celebrate. Bitcoin's whole appeal is that the network itself proves every coin is real. Zcash keeps that guarantee inside its own chain. This bolts privacy on by handing the proving job to the users.
The pool's backing stays visible though. The bitcoin locked into it sits on-chain, countable — so whatever goes wrong inside, more coins can't come out than went in. The damage has a ceiling.
But it's a paper, not a product yet.
5 sources
- In Order to Make Bitcoin as Private as Zcash, Researchers · cointribune.com · T2
- ‘Highly experimental!’ — Analysts split on new proposal for private Bitcoin transfers · ambcrypto.com · T2
- Bitcoin Privacy Breakthrough: New Proposal Mimics Zcash Without Network Changes · blockonomi.com · T2
- Can Bitcoin Become Private Without Changing It? · coindoo.com · T2
- COINDESK: Bitcoin could soon get Zcash-style 'shielded' privacy without changing its rules · coindesk.com · T1