时间：2026-09-24 00:26:11 来源：Urban Hub

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Privy’s Key Reconstitution for 120M Wallets Triggers Alarming Security Fears

**Introduction**
Privy, a widely used infrastructure provider for cryptocurrency wallets, recently disclosed that it is undertaking a large‑scale key reconstitution process affecting roughly 120 million user wallets. The announcement has sparked immediate concern among security researchers and crypto enthusiasts, who warn that the operation could expose sensitive private‑key material to cache‑side‑channel exploits. While Privy frames the move as a routine upgrade to improve performance and compliance, the scale of the undertaking has highlighted a lingering vulnerability that many in the industry believed had been mitigated years ago.

**Key Developments**
According to Privy’s technical blog, the reconstitution involves migrating legacy key shards from an older hardware security module (HSM) to a newer, cloud‑native enclave designed to support zero‑knowledge proofs. The process is being executed in batches over a four‑week window, with each batch requiring temporary decryption of key material in memory. Independent auditors noted that during these windows, the private keys reside in plaintext within the CPU cache for milliseconds—a window that sophisticated attackers could exploit via Flush+Reload or Prime+Probe techniques. Privy has responded by enabling constant‑time algorithms and inserting noise‑generation routines, but critics argue that these mitigations have not been formally verified against the latest side‑channel research.

**Industry Analysis**
The incident underscores a broader trend: as wallet providers shift toward scalable, cloud‑based architectures, they often inadvertently reintroduce attack surfaces

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