Is RESTful web service secured enough for Banking applications?

I'm going to develop a Banking application that will send and receive information to mobile devices of bank account holder. I want to use REST api of Spring framework for this purpose. Is there any bank that uses RESTful api for applications? Does RESTful api provide enough security for this purpose? Or should I stick to use SOAP web service? I know, this question is asked several times. But I want to concentrate on feasibility of REST api for Banking domain.