Ethereum aims to be safe from quantum computers by late 2028

Ethereum Foundation researcher Justin Drake says the team hopes to finish its post-quantum switch by December 2028. The official target is still December 2029.

Evento: 3 de novembro de 2026
Fonte primária: 4 de novembro de 2026
Publicado aqui: 4 de novembro de 2026 às 09:20 UTC
Ler: 3 min

O que aconteceu

Justin Drake of the Ethereum Foundation gave a talk on November 3. He said the team hopes to finish moving to cryptography that resists quantum computers by December 2028. That is a year earlier than the official target in the EF's September roadmap: December 2029. The roadmap itself has not been replaced and will be reviewed in January 2027 (Cointelegraph).

Por que importa para você

If you hold ETH, this affects you. A powerful quantum computer could in theory work out a wallet's private key from its public key. The public key is visible for any address that has ever sent a transaction. Ethereum is changing its signatures early so that day does not catch the network off guard.

O que conferir e observar

Watch for the EF roadmap review in January 2027 and the next hard forks. Validators should check whether they still have old 0x00 withdrawal credentials. This is an overview, not advice.

Onde está acontecendo

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EF protocol roadmap (original)

What happened. Ethereum Foundation researcher Justin Drake said: "Our hope is that by December 2028 we'll be able to wrap up the full post-quantum and post-AI transition." He said there are 24 months and three more network upgrades to get there (Cointelegraph, Incrypted).

What came before. In September 2026 the EF protocol team published a plan: Ethereum should resist quantum attacks across all three layers by December 2029. Those layers are execution (transactions), consensus (validators) and data. The EF wrote that it treats this deadline as fixed at least until January 2027, when it will review progress. Drake's words do not change the official plan yet.

What changes. Per Incrypted, the ECDSA signature in transactions is to be replaced with leanSphincs, the validators' BLS signature with leanXMSS, and KZG on the data layer with leanDA. All of it rests on hash functions, which are considered resistant to quantum computers. A hash function turns any data into a short fingerprint that cannot be reversed.

Why the rush. Q-Day is the day a quantum computer can break today's cryptography. The EF's September plan says to prepare for it as early as 2030. Per Incrypted, Drake's own base case is 2032, with a 10% chance it happens before 2029. These are his estimates, not facts.

Who this affects. ETH holders, validators, and wallet and app developers. Drake estimates, per Incrypted, that 72% of ETH sits on addresses that have already signed transactions. He suggests thinking about moving funds to a fresh address that has never signed anything. There is no emergency: the EF says the quantum threat is not imminent.

What we do not know. Whether the EF adopts the new date officially in January 2027. When exactly the next upgrade, Glamsterdam, ships: in September the EF said December 2026, while the talk, per Incrypted, mentioned January 2027. Whether three hard forks fit into 24 months.

Fatos confirmados

Justin Drake of the Ethereum Foundation said the team hopes to finish the post-quantum transition by December 2028.^[2]^[3]
The EF's September roadmap targets quantum resistance across all three layers by December 2029.^[1]
The EF holds the December 2029 deadline fixed at least until January 2027, when it will review progress.^[1]^[2]
Drake allows 24 months and three network upgrades for the transition.^[2]^[3]
The EF's September plan says to prepare for Q-Day as early as 2030.^[1]
Planned swaps: ECDSA to leanSphincs, BLS to leanXMSS, KZG to leanDA.^[3]
Drake estimates 72% of ETH sits on addresses that have already signed transactions.^[3]

Implicações

ConfirmadoThe EF's official target is still December 2029. 2028 is a researcher's hope.
Nossa leituraUsers with old addresses will likely need to move funds or switch account type at some point. That is our reading, no dates yet.
Nossa leituraWallets and apps will need to support the new signatures. That is our reading of the EF plan.