A：这是JDK 27新增的网络安全功能，通过实施混合密钥交换算法来增强Java应用程序的安全性。该算法结合量子抗性算法与传统算法，能够防御未来量子计算攻击，使用javax.net.ssl API的应用程序将默认受益，无需更改现有代码。

Oracle has released a new Java security update to address multiple vulnerabilities, including one exploited during a recently disclosed attack that can allow eavesdropping on encrypted communications.