Dash Launches ZK-Based Privacy on Zcash

cryptonews.ruPubblicato 2026-07-30Pubblicato ultima volta 2026-07-30

Introduzione

Dash has integrated ZK-privacy based on Zcash's Orchard protocol into its Platform (v4.0.0), making shielded transactions part of the consensus. This built-in protocol feature offers an optional second layer of privacy alongside Dash's existing CoinJoin, better suited for fast mobile wallets. Shielded operations hide sender, receiver, balance, and amount within a pool, using zero-knowledge proofs to validate transactions without revealing details. Users can deposit credits into the pool from a transparent address, conduct private transfers, and withdraw funds. Key features include direct deposits from Dash Core and shielded withdrawals to Core addresses. The implementation adapts Zcash's Orchard protocol to Dash Platform, incorporating structures like SumTree to prevent hidden inflation. A recent critical vulnerability in Orchard was patched prior to Dash's release. Wallet synchronization, tested at around 21 seconds, is notably faster than similar Zcash wallets. While initially supporting only Platform Credits (pegged to Dash), Dash plans to add separate shielded pools for native Platform tokens and assets. This move aims to combine ZK-privacy with token and NFT issuance, linking user-created assets directly to the established Dash cryptocurrency and external markets. Mobile wallet releases with this functionality are expected soon.

In February, we wrote about Dash's plans to integrate Orchard. At that time, it concerned a future release and the prospect of private user tokens.

Now, the first part of the plan has been realized: in Dash Platform v4.0.0, shielded operations have become part of the consensus. This is not an external mixer, not a custodial service, and not an experimental smart contract — privacy is built directly into the protocol.

For Dash, historically associated with CoinJoin, this is not a replacement for the old mechanism, but a second privacy model. CoinJoin continues to work on the main network, while Platform uses ZK-proofs instead of mixing rounds with multiple participants. This approach is better suited for fast mobile wallets. At the same time, regular Dash transactions remain transparent: confidentiality is optional.

The shielded pool hides the balance, sender, recipient, and transfer amount within the pool. The network verifies that the funds exist, belong to the sender, and are not spent twice, but does so without revealing the operation's contents.

A user can deposit credits into the pool from a transparent Platform address, conduct a private transfer, and return the funds. For DASH holders, two other routes are more important: ShieldFromAssetLock sends funds to the shielded pool directly from Core, and ShieldedWithdrawal withdraws them to a specified Core address. To avoid linking the withdrawal to previous activity, the wallet must use a new address.

Platform Credits — the internal settlement unit of Dash Platform, tied to Dash at a fixed ratio: one Dash corresponds to 100 billion credits.

How the Privacy Works — Without the Complicated Math

Dash did not create a new ZK-scheme from scratch. The implementation is based on Orchard, Zcash's shielded protocol built on Halo 2 without a trusted setup. Dash's engineering work involved adapting it to Platform: custom state transitions, storage in GroveDB, fees, wallet synchronization, and the route back to Core.

Shortly before the release, a critical vulnerability was discovered in Orchard, potentially allowing double spending within the pool. The Zcash team fixed the proof scheme, and Dash Core Group transitioned its implementation to the updated libraries even before the release of Platform 4.0. An additional layer of control in Dash is provided by SumTree: this structure stores and cross-references the pool's state, preventing hidden inflation from going unnoticed.

One of the main problems with shielded systems is wallet synchronization. To detect incoming funds, the application receives encrypted notes and locally checks which ones its key can decrypt. The server does not learn which transfers belong to the user.

In the test version of the application, we created a new wallet and started synchronization: it took about 21 seconds, which is significantly faster than synchronizing the Zodl wallet for ZCash.

The release of mobile wallets with support for the new technology is expected soon.

Currently, the pool only works with Platform Credits. However, Dash has already announced plans to add separate shielded pools for native Platform tokens.

Private user assets are not a new concept. Dash's strength lies in the specific combination of capabilities: ZK-privacy, token and NFT issuance, and the ability to exchange created assets for Dash and back. Thanks to this, each asset gains a direct connection to an already established coin, and through it — to the external market.

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Domande pertinenti

QWhat is the main innovation introduced in Dash Platform v4.0.0 regarding privacy?

ADash Platform v4.0.0 integrated shielded operations directly into the consensus protocol, based on Zcash's Orchard protocol. This is not an external mixer or a custodial service but a native, protocol-level privacy feature using zero-knowledge proofs.

QHow does the new shielded privacy model in Dash differ from its previous CoinJoin mechanism?

AThe new shielded privacy model using ZK-proofs is a second model of privacy that operates within the Platform, designed to be better suited for fast mobile wallets. The original CoinJoin mechanism, which operates in the main network for mixing transactions, continues to function. Regular Dash transactions remain transparent, making privacy optional.

QWhat critical issue was discovered in the Orchard protocol shortly before the Dash Platform v4.0 release, and how was it addressed?

AA critical vulnerability was discovered in the Orchard protocol that could potentially allow double-spending within the shielded pool. The Zcash team fixed the proof scheme, and the Dash Core Group updated their implementation to the patched libraries before the release. Dash adds an additional layer of control with SumTree, which monitors the pool's state to prevent hidden inflation.

QHow does Dash Platform ensure wallet synchronization privacy when detecting incoming shielded funds?

ATo maintain privacy during synchronization, the application receives encrypted notes from the server and locally checks which ones can be decrypted with its own key. This process allows the user to detect incoming funds without revealing to the server which specific transactions belong to them.

QWhat are Dash's future plans regarding shielded pools and assets on its platform?

ADash has announced plans to add separate shielded pools for native tokens on the Platform. This will extend ZK-privacy to user-issued assets and NFTs, allowing for private trading of these assets and their direct exchange for Dash, linking them to an established coin and the external market.

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