và hướng các dịch vụ Web. Nếu hai nhà cung cấp cạnh tranh có thể đạt được mục tiêu này, chúng tôi có tiềm năng tốt để đạt được các dịch vụ Web nói chung khả năng tương tác an toàn. Khả năng cộng tác dịch vụ Web (WS-I) tập đoàn, mà những điều này và nhiều công ty khác thuộc, | Interoperability of Web Services Security Technologies 297 and direction of Web Services. If two major competing vendors can reach this goal we have good potential to achieve general Web Services secure interoperability. The Web Services Interoperability WS-I consortium to which these and many other companies belong is dedicated to Web Services interoperability giving further promise for interoperability solutions. Back-Office Tier The last security tier to be addressed is the tier where legacy applications such as mainframes databases and nondistributed applications reside. The mid-tier applications will probably have a need for additional data at some point in the workflow. Normally this data is held in back-end relational databases. In many cases this corporate data such as accounting data customer information or employee information has existed in the system long before any of the new technologies such as Web Services came on the scene. The protection scheme for such data will in all probability have a different format from the protection scheme used in the newer Web Services applications and may require authentication data that is disjoint from that used in the perimeter and the mid-tier. A well-known approach for bringing legacy applications into the distributed object world is to wrap the legacy applications with CORBA. In addition Java 2 Enterprise Edition J2EE defines the Java Connector Architecture for connecting to existing enterprise systems. One could use these technologies to form a bridge between the Web Services and legacy applications. In addition you will need to map to the specific security data needed by any legacy security that exists. Another approach is to wrap these applications with Web Services interfaces and have the implementation of the Web Services make direct calls to legacy applications. In the future many of these legacy applications will be upgraded to support Web Services. For example Oracle and IBM are actively implementing Web .
