The XML Signature implementation has been updated to Santuario 3.0.5. Support for four new SHA-3 based ECDSA signature methods have been added: `ECDSA_SHA3_224`, `ECDSA_SHA3_256`, `ECDSA_SHA3_384`, and `ECDSA_SHA3_512`. While these new algorithm URIs are not defined in `javax.xml.crypto.dsig.SignatureMethod` in the JDK update releases, they may be represented as string literals in order to be functionally equivalent. SHA-3 hash algorithm support was delivered to JDK 9 via [JEP 287](https://openjdk.org/jeps/287). Releases earlier than that may use third party security providers.