Encrypting SAML Request

Hi,
I am facing an issue with my SAML configuration in WildFly 10.0
I have configured SAML using picketlink.xml
Functionally it is working as expected, but I am able to decode the SAML request easily since it is not encrypted.
So When I tried to encrypt I am not able to achieve this.

Steps Tried:
1.Added Encrypt="true" and SupportsSignature="true" in PicketLinkIDP tag
2.Added two handlers for encryption.

https://docs.jboss.org/author/display/PLINK/Identity+Provider+Configuration#IdentityProviderConfiguration-SAMLEncryptionConfiguration

But still it does not work. Is there anything that I am missing or needs to be configured?