Cardano (ADA) has been ranked second on a listing of blockchains that has the potential to withstand any future quantum-computer assaults. In a paper from Google Quantum AI shared by Cardano consultant dori, she notes that the rating was based mostly on how ready blockchains have been to improve to “post-quantum cryptography.”
Cardano secures second place as Algorand leads
Notably, the rating thought of blockchains based mostly on whether or not public keys have been uncovered and if the protocol helps key rotation or upgrades. It additionally factored in how lengthy transactions keep susceptible earlier than they’re confirmed on the blockchain.
As per the rating, Algorand is the one blockchain forward of Cardano as a result of it has already examined quantum-resistant transactions in a stay atmosphere and helps rotating keys. This means that if quantum threats have been to floor now, solely Algorand, theoretically, has the infrastructure emigrate its customers to safer cryptography.
🧵Quantum Safety Rating based mostly on the Google Quantum AI paper (summarized with Claude):
[Tier 1 – Leading the pack]
– AlgorandThe one main chain that has already executed a quantum-resistant transaction in manufacturing. Helps native key rotation and has made post-quantum… pic.twitter.com/koJM2Khr1Q
— dori (@dori_coin) April 1, 2026
Cardano, for its half, is taken into account secure by design, because it hides public keys longer than different blockchains. Cardano makes use of the eUTXO mannequin, the place spending keys stay hashed till funds are spent. This design confers a degree of safety on customers within the ecosystem.
The function prevents any potential attacker from seeing the important thing till the transaction happens. Different initiatives on this degree with Cardano embody Dogecoin, Zcash and Bitcoin Money. All of them have been termed “tier 2” by the Google Quantum AI paper. That’s, they’re structurally better off in comparison with different blockchains.
In the meantime, the paper has two different classes of blockchain, described as “susceptible however making ready” and “broadest assault floor.” XRP Ledger, Litecoin and Bitcoin fall into the “susceptible however making ready” class.
The networks of those blockchains usually expose public keys extra usually, which doubtlessly leaves them open to quantum attackers.
Ethereum and Solana are thought of to have the broadest assault floor as a result of their public keys are at all times seen. This flaw provides quantum attackers excessive alternatives to strike.
Cardano’s preparedness for post-quantum safety
It’s price mentioning that the analysis paper is deciphering blockchains based mostly on future projections, as quantum computer systems that may break the cryptography of networks that don’t exist but. They continue to be a future chance, which some analysts think about is over 10 years away.
Moreover, most blockchains are already planning upgrades by way of forks earlier than the menace occurs. As an example, the Ethereum Basis says it’s actively planning a quantum-safe migration round 2029.
Apparently, Cardano Midnight’s Chief Know-how Officer, Sebastian Guillemot, in October 2025, assured customers that the platform is secure from quantum laptop threats. This alerts that the Cardano blockchain has been proactively making ready forward of future potential threats.
