Ethereum (ETH) founder Vitalik Buterin (비탈릭 부테린) proposed a “walkaway test” that asks whether the network can survive on its own even if core developers disappear. He stressed that Ethereum’s ultimate goal is to become a finished tool that can be permanently set in place.

On Jan. 19, Cointelegraph reported that Buterin wrote in a recent blog post that Ethereum should not be a “service” that works only with constant tinkering. He said it should be a robust tool that can be used at any time without losing functionality even under external pressure or a lack of developer interest. He referred to the network’s “ossification,” meaning a structure that can operate as it is without relying on new features.

The “walkaway test” is a concept for gauging how reliable Ethereum is over the long term. The core is simple. It asks whether Ethereum can remain safe and functional even if core developers do not actively intervene, or if external pressure or waning interest occurs. Buterin likened it to a hammer that works properly even if a specific company or vendor disappears. He stressed that an ideal blockchain should run on its own without continuous, high-risk protocol changes.

Buterin’s stated end goal is an Ethereum that can “ossify if we want to.” This means a state in which the network’s value and reliability hold up using only the functions available now, without depending on unimplemented features or future promises. An Ethereum that reaches this stage would advance gradually through client optimisation and conservative parameter tuning, rather than repeated redesign.

Buterin laid out conditions Ethereum must meet to reach that state, and singled out “full quantum resistance” as a key element. It is still unclear when quantum computers could neutralise existing public-key cryptography. Even the U.S. National Institute of Standards and Technology (NIST) says it cannot predict the exact timing. Still, quantum preparedness matters because cryptographic transitions proceed very slowly. NIST says it could take 10 to 20 years after new algorithms are standardised for them to be applied to real products and infrastructure.

Another risk is the so-called “harvest now, decrypt later” scenario. It assumes that even if encrypted data cannot be decrypted today, it can be collected in advance and decrypted in the future once quantum computing matures. Because of this risk, several standards bodies have moved beyond research and begun preparing for actual transitions. NIST finalised its first post-quantum cryptography standards in 2024 and recommended early migration. Britain’s National Cyber Security Centre (NCSC) has also defined post-quantum cryptography migration as a long-term project and set phased deadlines.

On Ethereum, quantum preparedness goes beyond simply introducing new cryptographic algorithms. The key is ensuring the network is not locked into today’s signature methods and can remain usable even if security assumptions change. A key piece here is “account abstraction.” Account abstraction is a model that lets Ethereum approve transactions using various rules and verification methods, rather than being permanently fixed to a single signature algorithm. In theory, it opens a path to gradually introduce post-quantum signatures without upgrading the entire network at once.

In research, efforts are exploring ways to apply post-quantum signature schemes such as Falcon to Ethereum transactions, along with practical trade-offs including performance costs and greater complexity. These technologies are not yet fully implemented, and on the Ethereum roadmap they are classified as long-term tasks. Even so, account abstraction itself is already being used in practice. According to the Ethereum Foundation (EF), since EIP-4337 was introduced on the mainnet in 2023, tens of millions of smart wallets and hundreds of millions of user operations have been processed.

Interpreted technically, the walkaway test asks whether Ethereum can swap out cryptographic primitives without emergency and risky protocol changes. Ethereum currently relies on multiple signature schemes, using ECDSA signatures for user accounts and BLS signatures for proof-of-stake validators. If a post-quantum transition occurs, it will require the introduction of new validation paths, key and signature rotation, and gradual changes that do not harm the existing user experience at the same time.

The ultimate purpose of the walkaway test, as Buterin describes it, is reliability. He argues Ethereum’s value should not rest on features that are not yet in the protocol or on future promises, but should be sustained by the structure already built. Quantum preparedness is becoming an important element within that framework. It is not a problem that can be solved in the short term, but a long-term security task spanning decades. Ultimately, the test asks whether Ethereum will become trustworthy infrastructure that can evolve on its own, or remain a system that is hard to run without ongoing intervention by a few.