What is security standard in soap in using wcf.net

This is very vast topic.

You can select the binding according to your requirement.

BasicHttpBinding - Response of WCF is readable format

WsHttpBinding -  Response of WCF is encrypted format

 

Apart from this you have token based security and cerificated based. 

 

Please check these Links

 

https://docs.microsoft.com/en-us/dotnet/framework/wcf/feature-details/security-overview

 

https://docs.microsoft.com/en-us/dotnet/framework/wcf/feature-details/transport-security-with-certificate-authentication

 

https://docs.microsoft.com/en-us/dotnet/framework/wcf/feature-details/web-services-protocols-supported-by-system-provided-interoperability-bindings 

https://www.codemag.com/article/0611051/Fundamentals-of-WCF-Security

 

go through the above link