XML adds muscle to new firewalls.

With no tried-and-true (or even agreed-upon) methods to secure XML messages and schemas, the march toward Web services has been halting and unsteady, despite the efforts of standards organizations to develop frameworks to secure Web services. The lack of a guaranteed level of trust between enterprise Web services deployments represents a major stumbling block to widespread Web services deployment beyond the enterprise. Take one look at public-key infra- structure, which struggled for years to gain acceptance, and it should be obvious that Web services security issues must be resolved for the technology to become ubiquitous beyond enterprise borders.