OpenSSL 3.5: Upcoming Release Announcement

The freeze date for OpenSSL 3.5 Alpha is rapidly approaching. If you have a feature on the planning page, please ensure that your associated PRs are posted, reviewed, and ready to be merged before the include/exclude decision date (Tuesday, February 11, 2025) and merged before the repository freeze date (Tuesday, February 25, 2025). Otherwise, the feature will be postponed until the next release.

Important dates

  • Feature branches include/exclude decision date: February 11, 2025
  • Feature branches merge: February 18, 2025
  • Repository freeze date: February 25, 2025
  • Alpha release date: March 11, 2025
  • Beta release date: March 25, 2025
  • Release date: April 8, 2025
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Current highlights of the feature list planned for 3.5 include:

  • QUIC server - QUIC (RFC 9000 - Quick UDP Internet Connections) is a protocol intended to deliver faster, secure communication for Internet applications. Standardized as RFC 9000, QUIC operates over UDP.
  • ML-KEM - Module Lattice Based Key Encapsulation Mechanism (FIPS 203), a post-quantum cryptography algorithm for key encapsulation for secure key exchange.
  • ML-DSA - Module Lattice Based Digital Signature Algorithm (FIPS 204), a post-quantum cryptography algorithm for signature generation and verification for proof of authenticity and non-repudiation.
  • SLH-DSA - Stateless Hash Based Digital Signature Algorithm (FIPS 205), a post-quantum cryptography algorithm for signature generation and verification for proof of authenticity and non-repudiation.

If you have any questions or comments regarding the OpenSSL 3.5 release contact us at feedback@openssl.org.