OpenSSL 4.0.0 release cuts deprecated protocols and gains post-quantum support (opens in new tab)

OpenSSL 4.0.0 removes several long-deprecated features, adds support for Encrypted Client Hello, and introduces API-level changes that will require code updates for applications built against older versions. SSLv3, SSLv2 client hello, and engines are gone SSLv3 support has been removed. The protocol was deprecated in 2015, and OpenSSL had it disabled by default since version 1.1.0 in 2016. Support for the SSLv2 Client Hello has also been removed. The engine API, which provided a mechanism … M...