WCF REST Security Options for clients not all using .NET

We have a WCF RESTful service which is to be consumed by Android (Java) and iPhone/iPad devices running MonoTouch (.NET)

What security 开发者_运维百科options can WCF support which Android (Java) and iPhone (.NET) take advantage of?

---

For interoperability reason the best security option is HTTPS for confidentiality and integrity and either custom or HTTP Basic authentication.