GnuPG introduces support for post-quantum crypto encryption & 64-bit Windows improvements

GnuPG 2.5.19 has been released, offering compatibility with prior versions along with several new features and bug fixes. Notably, this update introduces Kyber, also known as ML-KEM or FIPS-203, enabling post-quantum cryptography for enhanced encryption. These improvements target both general users and those on 64-bit Windows platforms, reflecting the core focus of the 2.5 series.

Following these core enhancements, pinentry behavior and messaging have been improved for users working within smartcard contexts. Administrators and advanced users may find it helpful that this version now emits more detailed information when certificate revocation list distribution point (crlDP) checks fail, simplifying troubleshooting and debugging. The --cipher-algo option is more flexible, now allowing users to specify cipher mode directly as part of the algorithm string.

Building on these command-line enhancements, GnuPG 2.5.19 introduces two new options: --use-ocb-sym and -show-[only-]session-hash. Additionally, a new clear keyword for the --keyserver option streamlines changes to keyserver configurations. It is also important for users to note that the previous 2.4 series will become unsupported in two months, making an upgrade to 2.5.19 necessary to ensure continued updates and security.