Après le lancement de la blockchain Arc de Circle, la feuille de route de la cryptographie quantique couvre une mise à niveau complète de la pile, du portefeuille au validateur

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Golden Finance reports that on April 6, according to the official blog, Arc, an institutional blockchain under Circle, has released a phased upgrade roadmap for post-quantum cryptography (PQ). It plans to introduce a post-quantum signature scheme at the time of mainnet launch and gradually cover end-to-end layers such as private state protection, infrastructure hardening, and validator authentication.
At launch, the Arc mainnet will support post-quantum signatures using an opt-in mechanism, without requiring mandatory migration or a full network reset, allowing users to create wallets with long-term security on their own. The near-term goal is to extend quantum resistance to the private virtual machine (VM) layer, protecting private balances, private transactions, and private recipients. The public key will be additionally encapsulated with a symmetric encryption layer in privacy mode.
The mid-term plan is to advance upgrades to the infrastructure layer, aligned with industry standards such as TLS 1.3, covering access control, cloud environments, and hardware security modules (HSM). The long-term goal is to complete validator signature hardening. Given that the final confirmation time for Arc block production is under 1 second, current assessment suggests that quantum attack risk in this stage is relatively limited. The initiative will be steadily pushed forward once post-quantum consensus tooling matures.
Circle also cautions that attackers may adopt a “collect now, decrypt later” strategy, and institutions should plan their cryptography migration paths as early as possible.

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