The XMLDSig provider implementation in the `java.xml.crypto` module has been updated to version 2.1.1 of Apache Santuario. New features include: 1. Support for the SHA-224 and SHA-3 DigestMethod algorithms specified in RFC 6931. 2. Support for the HMAC-SHA224, RSA-SHA224, ECDSA-SHA224, and RSASSA-PSS family of SignatureMethod algorithms specified in RFC 6931.