XML signatures are mostly used to verify the integrity and source of data. It is done using keys. One of the methods involves public and private keys. Author of document would use a private key for signing the data. This would create a digital signature, which is then added to an XML document.

Receiver, need to have a copy of the author’s public key, would then use that key to verify the signed data.

There are three types of XML signatures
1.Enveloped signatures
2.Enveloping signatures
3.Detached signatures