Quantum-Safe Migration Timelines in Enterprise Email Systems: Operational Realities Beyond Cryptographic Theory

企业邮件系统的量子安全迁移时间表：超越密码学理论的运营现实

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Enterprises scheduling quantum-safe email migration cite NIST PQC standardization dates—but overlook that S/MIME certificate authorities require 18–24 months to validate new signature schemes across global trust stores.
Legacy email clients embedded in ERP systems often hardcode TLS 1.2 cipher suites, making post-quantum key exchange integration impossible without full platform upgrades.

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