This is qpdf version 10.4.0. This is primarily a bug-fix release. Notable changes: OpenSSL 3.0 is now supported. When using the openssl crypto engine, the openssl version is detected at compile-time. The distributed Windows releases are now built with openssl 3. We also issue warnings in some cases when weak cryptographic algorithms are used. These warnings can be turned off.
For a full list of changes from previous releases, please see the release notes. See also README-what-to-download for details on the available source and binary distributions.