How Diffie-Hellman Key Exchange Provides Encrypted Communications | UpGuard
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This article explains how the Diffie-Hellman key exchange works, outlines risks from weak or commonly reused primes (including the historical Logjam vulnerability CVE-2015-4000), and provides three practical mitigations—disable export ciphers, deploy ECDHE for ephemeral elliptic-curve exchanges, and use strong (>=2048-bit) Diffie-Hellman groups—along with guidance for configuring server software.
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