Google has put a firm 2029 target on rolling out post-quantum cryptography across its products, giving a hard date to a security risk that the company says is moving closer. Google tied the decision to faster progress in quantum hardware, improvements in error correction, and updated estimates for when today’s cryptographic systems could become vulnerable. The company said current standards used for encryption and digital signatures will not remain safe indefinitely, and that the industry should begin shifting sooner rather than later.
In its latest update, Google stated plainly that “Quantum computers will pose a threat to current cryptographic standards.” It added that post-quantum migration is needed so users can continue to rely on secure authentication services across its products. Google also said it wants to set a public example for other companies and institutions by attaching an ambitious timeline to the transition.
Hardware gains are changing the timetable
The 2029 deadline is the first time Google has attached a clear migration target to its post-quantum work. That date comes earlier than some estimates for Q-Day, the point at which quantum machines could break widely used public-key encryption. By bringing the timeline forward, Google is signaling that the issue is no longer a distant theoretical concern. It is becoming an engineering deadline.
The company’s reasoning rests on several shifts happening at once: better quantum hardware, stronger error-correction methods, and revised calculations about how long current encryption can still be trusted. For large platforms that depend on authentication, data protection, and digital signatures at scale, migration planning cannot wait until the threat is immediate.
Ethereum targets protocol-level protection by 2029
The same discussion is moving quickly across crypto. This week, the Ethereum Foundation launched a Post-Quantum Ethereum resource hub and said it wants protocol-level protections in place by 2029. Its current plan centers on securing the network against future quantum threats, with execution-layer work expected later.
That approach suggests Ethereum is treating quantum resistance as a core protocol question rather than a wallet-side patch. For blockchains built on existing cryptographic assumptions, that kind of upgrade reaches deeply into network design and takes time to prepare, test, and coordinate.
Bitcoin and Solana are not taking the same route
Solana developers introduced a quantum-resistant vault in January 2025. The design uses hash-based signatures and generates a new key for each transaction. But it does not upgrade the full network. Users must move funds into specialized Winternitz vaults to get that protection, which makes the feature optional and structure-specific.
Bitcoin developers remain divided over both urgency and timing. Blockstream chief executive Adam Back said quantum risks are overstated and that action is not needed for decades. Ethan Heilman and other researchers have backed BIP-360, a proposal that would add a new output type aimed at reducing short-exposure quantum risks. The split is not just about solutions. It is also about whether the threat warrants action now.
Google’s 2029 deadline, Ethereum’s protocol-level planning, Solana’s vault-based design, and Bitcoin’s internal debate point to the same shift: quantum safety is moving out of abstract research and into implementation choices. The remaining question is no longer whether systems may need to change, but which systems move first and how they do it.