Cardano (ADA) has been recognized as the second most secure blockchain in terms of resistance to potential quantum-computer attacks. A recent study from Google Quantum AI, shared by Cardano representative dori, highlighted the importance of upgrading to “post-quantum cryptography” to enhance blockchain security.
The ranking considered various factors such as the exposure of public keys, support for key rotation or upgrades, and the duration of vulnerability for transactions before confirmation on the blockchain. Algorand emerged as the top-ranked blockchain, as it has already implemented quantum-resistant transactions and supports key rotation.
Cardano, on the other hand, employs a design that conceals public keys for a longer period, providing added protection to users. By utilizing the eUTXO model, spending keys remain hashed until funds are spent, preventing potential attackers from accessing the key prematurely. Other projects like Dogecoin, Zcash, and Bitcoin Cash were also recognized for their structural advantages in terms of security.
In contrast, blockchains like XRP Ledger, Litecoin, and Bitcoin were categorized as “vulnerable but preparing,” while Ethereum and Solana were deemed to have the “broadest attack surface” due to the visibility of their public keys.
It is important to note that the research paper is forward-looking, considering potential quantum threats that may arise in the future. While quantum computers capable of breaking cryptographic networks are not yet a reality, many blockchains are proactively planning upgrades to ensure security. Cardano Midnight’s Chief Technology Officer, Sebastian Guillemot, reassured users of Cardano’s preparedness for future threats from quantum computers, indicating a proactive approach to security measures.
