Ethereum L2 security questioned as Solana pushes quantum-resistant tech

The CEO of Solana Labs and the visionary behind the Solana blockchain, Anatoly Yakovenko, has offered a new perspective on how quantum technology threatens blockchain security. This comes shortly after Solana developed technology capable of withstanding future quantum threats.

In a post on X dated May 2, 2026, Yakovenko noted that, “Ethereum L2s are not quantum safe; abandon all hope.” Analysts noted that the statement was significant, as Bitcoin is subject to comparable quantum threats.

On April 27, the Solana Foundation shared a website page notifying users that Solana has made a crucial advancement in post-quantum cryptography. Anza and Firedancer, its leading technical teams, selected the Falcon digital signature scheme for post-quantum security. The initial implementations have been finalized and are now available on GitHub. 

At this point, critics say the security methods used by Ethereum Layer 2 will not be strong enough against advanced quantum computers. They unveiled that most L2 system user wallets utilize the secp256k1 curve and rely heavily on the Elliptic Curve Digital Signature Algorithm (ECDSA).

Uncertainty surrounds blockchain’s future as quantum threats intensify 

First, when a transaction is broadcast, the public keys involved become visible to everyone on the blockchain. These keys may be vulnerable to future cryptographic attacks as quantum computing undermines current encryption.

Yakovenko warned that such an incident could result in a “harvest now, decrypt later” threat. Here, an attacker gains access to current transaction data and then stores it for future decryption using Shor’s algorithm on a quantum computer. This technology could let hackers piece together private keys and illicitly access funds.

According to tech experts, the quantum security conversation highlights a wider industry vulnerability that extends far beyond Ethereum Layer 2 systems. For instance, Ethereum and Solana, key blockchains, use elliptic curve cryptography to validate transactions. 

Theoretically, known algorithms could enable powerful quantum computers to compromise these cryptographic systems.

Nonetheless, this vulnerability is inherent in almost all blockchains. Analysts argue that it is a long-term concern rather than an immediate threat.

Given that Layer 2 solutions rely on the same cryptographic foundations as their main chains, they inherit the same vulnerabilities. Hence, attaining quantum resistance poses an industry-wide challenge.

Yakovenko identified issues with the economic design of Layer 2 solutions. According to him, too many rollups fragment liquidity and break up user communities.

This splitting could weaken network effects and divert transaction revenue from the main layer. Critics argued that Layer 2 scaling boosts performance but hinders economic alignment within the broader ecosystem.

Ethereum ecosystem supporters, on the other hand, have advocated for Layer 2 expansion as a necessity for long-term growth. They accept that it may cause immediate, short-term issues.

This debate emerges as blockchain developers explore post-quantum cryptography solutions. Ethereum researchers began testing new signature methods designed to resist future quantum risks.

Still, upgrading an active network to new cryptographic standards poses significant technical challenges. The massive data and computational demands of these new solutions hinder their large-scale adoption.

Advancing decentralized cryptographic systems also requires careful planning to prevent network disruption and maintain security integrity.

Solana solidifies its position as a future leader in blockchain security

The Solana Foundation outlined a step-by-step initiative to transition its network to post-quantum cryptography. The plan outlined how advancements would be implemented as quantum computing matures into a practical cybersecurity threat.

The foundation shared an official blog post noting that” the roadmap focuses on gradual changes, beginning with research and updates at the wallet level instead of immediate changes to the protocol.” This approach reflects a view that quantum risks are not yet pressing.

Solana client development arms Anza and Firedancer created and established early versions of Falcon, a post-quantum digital signature algorithm. This move demonstrates technical alignment on potential network transition strategies.

According to the team, adopting Falcon supports their goal of maintaining small signatures and high throughput, both of which are critical to Solana’s performance-focused architecture.

Despite this progress, the foundation will not be making any immediate modifications to the network. Instead, they have phased their roadmap to align with advances in quantum technology.

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