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Vitalik Buterin Donates to Shielded Labs for Zcash Crosslink Security Upgrade

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TLDR:

  • Buterin’s donation funds Crosslink development from prototype to incentivized testnet and production phase. 
  • Crosslink adds finality layer to Zcash’s PoW chain, preventing reversals and strengthening settlement guarantees. 
  • The upgrade enables shorter exchange confirmations and improves cross-chain integration reliability for Zcash. 
  • Shielded Labs operates independently from Zcash Dev Fund, relying on donations from network supporters.

 

Ethereum co-founder Vitalik Buterin has donated to Shielded Labs to advance Crosslink development for Zcash. The contribution will fund progression from prototype to incentivized testnet and production readiness.

Crosslink adds a finality layer to Zcash’s proof-of-work consensus, protecting against chain reorganizations and rollback attacks. This marks Buterin’s second donation to the organization.

Crosslink Enhances Zcash Security Architecture

Shielded Labs announced the donation will support Crosslink’s continued development. The upgrade strengthens Zcash’s existing proof-of-work consensus through a parallel finality layer.

Block production and economic activity remain on the proof-of-work chain. Meanwhile, the finality gadget anchors blocks and provides stronger settlement guarantees.

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The architecture prevents confirmed transactions from being reversed. This reduction in double-spend risk increases confidence in transaction settlement across the network.

Exchanges can implement shorter confirmation requirements as a result. Cross-chain integrations gain improved reliability through the enhanced security model.

Applications requiring predictable settlement benefit from the increased consistency. The improvements facilitate easier integration into the broader crypto ecosystem.

Zcash maintains its existing security properties throughout the upgrade process. The design preserves the network’s core characteristics while adding protective measures.

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Commenting on the donation, Buterin stated that Zcash is one of the most honorable crypto projects. He praised the network’s steadfast focus on privacy as a defining characteristic.

According to Buterin, Shielded Labs’ Crosslink work will allow Zcash to be more secure. The upgrade will enable operation on a lower security budget, supporting long-term sustainability.

Production Phase Will Focus on Technical Readiness

The donation will fund the productization of the existing Crosslink prototype. Shielded Labs plans to launch a persistent, incentivized testnet where participants can earn ZEC.

The transition into productionization involves multiple technical components. Design specifications require completion before mainnet consideration.

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Security analysis will form a critical component of the development process. Audits will verify the robustness of the finality layer implementation.

Coordination with wallets and infrastructure providers ensures smooth integration. Proactive engagement with the Zcash community maintains transparency throughout development.

Progress toward mainnet activation depends on several factors. Technical readiness must meet established standards before deployment.

Security review processes need completion to validate the upgrade’s safety. Broad community support remains essential for major protocol changes.

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Shielded Labs operates as a Swiss-based Zcash support organization. The team focuses on protocol development projects that strengthen network security.

Funding comes from donations by Zcash holders and supporters. The organization maintains independence from the Dev Fund and block rewards.

Buterin’s first contribution in 2023 supported formation of a dedicated Crosslink team. He has contributed to discussions around protocol design and security for years.

Shielded Labs acknowledged his continued engagement with the Zcash ecosystem. The organization expressed appreciation for his support in advancing network resilience.

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Crypto World

Peter Brandt says Bitcoin a ‘hop, skip and jump’ from $42k

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Peter Brandt says Bitcoin a ‘hop, skip and jump’ from $42k - 1

Veteran trader Peter Brandt said Bitcoin could be approaching a potential downside floor, arguing that past bear market patterns suggest losses may be limited from current levels.

Summary

  • Veteran trader Peter Brandt said Bitcoin may be nearing a downside floor, pointing to past bear market cycles that suggest losses could be limited near the $42,000 level.
  • Brandt referenced a long-term “banana peel” support zone on his chart, which has historically marked areas where Bitcoin’s deepest drawdowns struggled to extend further.
  • The comments come amid a broader crypto market downturn, with Bitcoin and major altcoins under sustained selling pressure.

“If Bitcoin digs into the banana peel as deeply as in past bear market cycles, then the bulls should not need to suffer too far south of $42,000,” Brandt wrote on X. “We are a hop, skip and jump from there.”

Brandt accompanied the post with a long-term Bitcoin (BTC) chart showing price action relative to what he describes as a “banana peel” support zone, a curved lower boundary that has historically contained Bitcoin’s deepest drawdowns.

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Peter Brandt says Bitcoin a ‘hop, skip and jump’ from $42k - 1
Bitcoin long-term price action and ‘banana peel’ support zone | Source: Peter Brandt

Brandt’s “banana peel” metaphor refers to the slippery downside zone, where price can slide quickly but has historically struggled to sustain deep breaks below it.

In the current cycle, that lower boundary sits near the $42,000 level, implying Bitcoin may be nearing a historically significant area of support.

Brandt flags Bitcoin ‘campaign selling’ in prior warning

Brandt’s latest post follows a separate tweet from the previous day, in which he said Bitcoin’s recent price action appeared to reflect “campaign selling” rather than retail-driven capitulation.

In that earlier post, Brandt pointed to a multi-day pattern of lower highs and lower lows, suggesting that large, coordinated sellers may be driving the decline. He added that similar patterns have appeared in past market cycles, though timing a bottom remains uncertain.

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Together, the two tweets frame a cautious outlook: further downside may be possible, but historical behavior could limit how far prices fall.

The comments come as Bitcoin continues to slide alongside a broader crypto market downturn, with prices under pressure across major digital assets. Major altcoins have followed Bitcoin lower, amplifying losses across the sector.

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Vietnam Draft Rules Propose 0.1% Tax on Crypto Transfers

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Vietnam Draft Rules Propose 0.1% Tax on Crypto Transfers

Vietnam is preparing to introduce a tax framework for cryptocurrency transactions that would align digital assets with securities trading, according to a draft policy circulated by the Ministry of Finance.

Under the proposal, individuals transferring crypto assets through licensed service providers would face a 0.1% personal income tax on the value of each transaction, local outlet The Hanoi Times reported. The structure mirrors the levy currently applied to stock trades in the country.

According to the report, the draft circular, released for public consultation, classifies crypto transfers and trading as exempt from value-added tax. However, the turnover-based tax would apply to investors regardless of residency status whenever a transfer is executed.

Companies operating in Vietnam would be taxed differently. Institutional investors earning income from crypto transfers would be subject to a 20% corporate income tax, calculated on profits after deducting purchase costs and related expenses, per the report.

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Related: No companies apply for Vietnam crypto pilot amid high barriers

Vietnam formally defines crypto assets

Authorities also reportedly provided a formal definition of crypto assets, describing them as digital assets that rely on cryptographic or similar technologies for issuance, storage and transfer verification.

The draft also outlines strict requirements for operators. Firms seeking to run a digital asset exchange would need at least 10 trillion Vietnamese dong (about $408 million) in charter capital, a threshold higher than that required for commercial banks and far above capital standards in many other industries. Foreign ownership would be permitted but capped at 49% of an exchange’s equity.

Vietnam is ranked fourth in the world for crypto adoption. Source: Chainalysis

The proposed rules come as Vietnam began a five-year pilot program for a regulated crypto asset market launched in September 2025. On Oct. 6, 2025, Vietnam’s Ministry of Finance confirmed that no companies had applied to participate in the five-year crypto pilot at that time, citing high capital requirements and strict eligibility conditions.

Related: Vietnam central bank expects credit growth amid rapid crypto adoption

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Vietnam opens licensing for crypto exchanges

Last month, Vietnam started accepting applications for licenses to operate digital asset trading platforms, marking the operational launch of its planned pilot program for a regulated crypto market.