Zakura has released Zakura Common, a new collection of cryptographic and protocol libraries that dramatically reduces the processing time required for some Zcash shielded transactions. According to Zakura’s official release, optimized transaction creation can fall from more than three seconds to below 200 milliseconds in certain scenarios. The improvement targets wallet and node software rather than Zcash consensus, allowing compatible applications to adopt the faster cryptography without waiting for a network upgrade.
The release was developed alongside Zakura, the Rust-based Zcash full node led by protocol engineers including Zcash co-founder Sean Bowe. Zakura Common is publicly available under MIT and Apache-2.0 licenses. Its immediate objective is to reduce the computational friction surrounding shielded payments while keeping transactions compatible with the existing Zcash network.
Zcash Proof Generation Gets Major Speed Boost
The largest reported improvement is on mobile hardware, where proof generation became more than 14 times faster. Desktop proof generation improved by more than five times, while Sinsemilla hashing accelerated by more than 21 times. Trial decryption, used by wallets when scanning for encrypted outputs belonging to them, improved by more than 1.5 times. Together, those changes target several of the operations that have historically made shielded-wallet interactions slower and more resource-intensive than ordinary transfers.
Full nodes also benefit. Zakura reports that zk-SNARK verification is between four and eight times faster, potentially reducing some of the processing overhead associated with validating shielded transactions. The National Institute of Standards and Technology describes zero-knowledge proofs as cryptographic methods for proving that a statement is true without revealing the secret information supporting it. Faster implementations can therefore improve usability while preserving the privacy properties that make zero-knowledge systems valuable.
The mobile gains are particularly relevant because constrained hardware has historically made advanced privacy cryptography more difficult to deploy smoothly. Reducing proof-generation latency brings shielded transactions closer to the responsiveness users expect from mainstream mobile wallets, although actual performance will still depend on device hardware, wallet implementation and transaction complexity.
50,000 TPS Remains a Long-Term Goal
Zakura’s broader roadmap is considerably more ambitious than the current library release. Its open-source full-node documentation says supporting payments at global scale would require throughput on the order of 50,000 TPS, compared with a chain currently peaking around 28 KB per second of block data. That 50,000 TPS figure is an engineering target for the broader Zcash scaling effort, not a benchmark achieved by Zakura Common today.
The project expects recursive proofs, private-information-retrieval work and faster node infrastructure to contribute to that longer-term objective. Zakura has separately said its current full node synchronizes nearly five times faster than Zebra and is being designed for much higher block-processing loads. Zakura Common addresses one layer of that scaling problem by making the cryptography itself substantially faster.
Because no consensus upgrade is required, wallet developers can begin evaluating the libraries immediately. The key next step is independent review and broader wallet integration, since performance improvements only benefit users at scale if implementations preserve transaction correctness, key security and Zcash’s intended privacy guarantees.
