.png){kind=logo}
Ethereum held above $1,600 and extended its rebound after breaking past $1,620 and $1,640. The price climbed toward $1,740, reached $1,731, and then settled above the 23.6% Fibonacci retracement level. A bullish trend line now supports the hourly chart near $1,665.
Ethereum traded above $1,680 and stayed above the 100-hour Simple Moving Average. The $1,665 area also remained important as trend-line support. If buyers defend that zone, the price could try another move higher.
Resistance sits near $1,720 first, then $1,740. A stronger push could carry the price toward $1,780. After that, $1,850 stands as the next major barrier.
Further upside could open the path to $1,880 and $1,920. Still, the market needs a clear break above $1,780 before that move gains strength. The price action now centers on whether buyers can keep momentum alive.
A Google Quantum AI paper published in March 2026 lowered the estimated hardware needed to break Ethereum account security by 20 times. Earlier estimates pointed to tens of thousands of logical qubits. The newer estimate came in at about 1,200 logical qubits.
Google found the revision credible enough to set an internal 2029 migration deadline for its own systems. Ethereum uses ECDSA to verify transactions. When an account sends a transaction, it exposes its public key on-chain.
That exposure creates a risk. A powerful enough quantum computer could derive the private key and drain the wallet. The danger extends beyond ordinary wallets. Validator signatures, data availability commitments, and the zero-knowledge proof systems used across rollups all rely on mathematics that quantum computers could eventually challenge.
The Ethereum Foundation formed a dedicated post-quantum security team in January 2026. Thomas Coratger leads the team, and the Foundation tracks its work publicly at pq.ethereum.org. Justin Drake has also identified post-quantum security as a top strategic priority.
The Foundation launched the Poseidon Prize, a $1 million research award focused on hash-based cryptographic improvements. That effort builds on three post-quantum cryptography standards that NIST finalized in August 2024.
Read More: Ethereum Battles Bear Flag Pressure as $1,700 Becomes Key Test
Near term, EIP-8141 remains under consideration for the Hegotá hard fork planned for the second half of 2026. The proposal introduces native account abstraction and lets accounts choose their own signature scheme. Full protocol readiness targets about 2029.
The Kohaku project already offers another path. It lets users deploy a quantum-resistant smart account through the ERC-4337 account abstraction standard. The cost is about $0.07 on the Layer 1 testnet.
Ethereum price held firm above key support while traders watched resistance near $1,740 and $1,850. At the same time, Google’s quantum research and Ethereum’s post-quantum plans made security a rising focus. The market now balances near-term price action with long-term protection needs
