Cryptography and SSL/TLS Toolkit

OpenSSL 3.1 Series Release Notes

The major changes and known issues for the 3.1 branch of the OpenSSL toolkit are summarised below. The contents reflect the current state of the NEWS file inside the git repository.

More details can be found in the ChangeLog.

Major changes between OpenSSL 3.0 and OpenSSL 3.1.0 [14 Mar 2023]

  • SSL 3, TLS 1.0, TLS 1.1, and DTLS 1.0 only work at security level 0.
  • Performance enhancements and new platform support including new assembler code algorithm implementations.
  • Deprecated LHASH statistics functions.
  • FIPS 140-3 compliance changes.