OpenSSL 4.0.0 release cuts deprecated protocols and gains post-quantum support
ID: 18f5783c-d2b0-5f84-be65-092ac88620e7
STIX ID: report--18f5783c-d2b0-5f84-be65-092ac88620e7
Feed Name: Help Net Security
**OpenSSL 4.0.0 release notes:** OpenSSL 4.0.0 removes long-deprecated features (SSLv3, SSLv2 Client Hello, engine API and several deprecated EVP/ERR functions), adds support for Encrypted Client Hello (ECH) and several post‑quantum-related primitives, and introduces API, behavior, build, and tooling changes that may require application code updates or configuration adjustments.
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