TL;DR:
- Zcash developers released Udon into Zakura Common, beginning the integration of Project Tachyon’s scaling work with software already used for private transaction creation.
- Tachyon targets more than 50,000 private payments per second by aggregating proofs, reducing how much data nodes must receive and verify as usage grows.
- The target remains long term: shielded activity is far lower today, and Tachyon still requires development and security review before possible activation.
Zcash developers are folding part of Project Tachyon into Zakura Common, moving the network’s long-term scaling work closer to software used for private transactions. In a Project Tachyon update, the team introduced Udon, a component originally built for Tachyon that has now been released inside the cryptography library. The move connects Zcash’s faster transaction stack with a broader plan to scale private payments beyond today’s limits. Earlier Zakura improvements cut private transaction creation from more than three seconds to under 200 milliseconds in some tests.
We're beginning to integrate Tachyon's cryptography with Zakura Common.https://t.co/w0oxxYwvHR
— Project Tachyon (@TachyonZcash) September 28, 2026
Tachyon Targets 50,000 Private Payments Per Second
Udon does not activate Tachyon or prove that Zcash can already reach its long-term throughput target. Instead, it moves calculations needed for the proposed upgrade into Zakura Common, where developers can build on code that has been optimized. The integration is a development milestone rather than a live network upgrade. The same Zakura Common performance work previously accelerated hashing, wallet syncing and proof verification without requiring changes to Zcash consensus.
The scaling challenge becomes extreme at the developers’ stated target of more than 50,000 private payments per second. At that rate, current cryptography could force each node to ingest more than 500 megabytes of data per second. Tachyon aims to reduce that burden by combining proofs from many payments so nodes have less information to receive and verify. Creating the aggregated proof requires more memory, making the faster cryptographic code inside Common important to the design.
Actual network usage remains far below that target. Shielded activity averaged about 11,700 transactions per day during the seven days through September 21, or roughly one every seven seconds, before falling to approximately 6,200 daily transactions through September 28. The gap shows that 50,000 TPS is a long-term engineering objective, not a near-term capacity forecast. Zcash is simultaneously preparing NU7 and 25-second blocks, which address a different layer of network performance.
The broader effort reflects Zcash’s push to make privacy practical at payment-scale throughput without weakening shielded transaction guarantees. Udon still requires development, and Tachyon needs security review before any possible activation. Scaling private payments requires reducing verification overhead without exposing sender, receiver or transaction amounts. That objective fits the network’s emphasis on privacy as core infrastructure and follows the Ironwood shielded-pool transition. For now, Udon gives developers a foundation for that scaling roadmap.
