Ethereum December 3 Fusaka Upgrade Sets the Stage for 8x L2 Scalability and Passkey Adoption

03. Dec 2025 Posted by Laurent C. on News

Ethereum is gearing up for its second major network upgrade of 2025, with the Fusaka hard fork set to activate on December 3, 2025, at 21:49 UTC. This upgrade introduces PeerDAS, a breakthrough that allows nodes to store just one-eighth of blob data while supporting up to 8x more data throughput for Layer 2 rollups.

Fusaka brings together the Osaka execution layer and Fulu consensus layer updates, delivering a powerful package of improvements centered on scalability, security, and long-term efficiency. It follows the May Pectra fork, which triggered a 29% rally in ETH and redefined validator operations across the network.

PeerDAS: Ethereum’s Biggest Leap in L2 Scaling

At the heart of Fusaka is Peer Data Availability Sampling (PeerDAS) — a system that drastically lowers node storage requirements while maintaining full data availability.
Under this model:

  • Nodes store ~80% less blob data

  • Data availability is preserved through distributed sampling

  • Blob capacity increases, making rollups far cheaper and faster

For Layer 2 networks that rely on Ethereum to post transaction data, this translates directly into lower blob fees and the ability to scale transaction throughput to new levels.

Ethereum’s official announcement emphasized this L2 acceleration:
“PeerDAS – Unlocking up to 8x data throughput. For rollups, this means cheaper blob fees and more room to grow.”

Fusaka Expands Infrastructure Flexibility

Beyond PeerDAS scalability, Fusaka introduces structural improvements that make the network more adaptive and resilient:

  • Blob-Parameter-Only forks allow the Ethereum community to adjust blob capacity without initiating a full hard fork.

  • Storage and bandwidth demands for nodes decrease, encouraging decentralization.

  • Stricter computational limits safeguard against high-gas DoS vectors.

  • EIP-7918 aligns blob fees with network congestion for more secure economics.

These adjustments make Ethereum more agile as Layer 2 demand continues to surge in 2025.

Passkey Integration Targets Institutional Onboarding

One of the most transformative user-facing features in Fusaka is native support for secp256r1 signatures, enabling seamless passkey authentication across Apple Secure Enclave, Android Keystore, and enterprise-grade devices.

This removes seed phrases from the onboarding flow—one of Ethereum’s biggest UX barriers—and could accelerate institutional adoption by offering:

  • FIDO-compliant authentication

  • Hardware-secured key storage

  • Familiar login experiences for large organizations

Industry leaders have described Fusaka as a milestone moment for onboarding enterprises into the Ethereum ecosystem.

Will Fusaka Move ETH’s Price? Analysts Split

Unlike Pectra, which aligned with favorable macro conditions earlier this year, Fusaka’s impact may be more nuanced.
This upgrade focuses on infrastructure, not speculative catalysts, meaning ETH’s response may depend primarily on:

  • Ongoing Layer 2 expansion

  • Institutional inflows facilitated by passkeys

  • Demand for cheaper, more scalable rollups

While it may not produce Pectra-style fireworks immediately, Fusaka lays the foundation for Ethereum’s long-term competitiveness—especially against fast-growing ecosystems like Solana.