We have published a new tutorial: it tells how to make a remote procedure call to a REST service with WS-Security data protection and x509 digital signatures. The given example connects to a REST service, which is written using C# WCF. The service implements a simple algorithm, which converts Celsius to Fahrenheit, and vice versa. Both SOAP requests and responses are digitally signed and encrypted using x509 cryptographic keys. Delphi client utilizes the TclHttpRio component from the Clever Internet Suite library.
The sources are available on GitHub