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What is Web Service in information security?
Web service is a standardized channel to propagate communication between the user and server applications on the WWW (World Wide Web). A web service is a software structure that is designed to perform a specific set of tasks.
In web service, it is a standardized method of integrating Web-based applications using the XML, SOAP, WSDL and UDDI open standards over an Internet protocol determination. XML can be used to tag the data, SOAP can be used to transfer the data. WSDL is used for defining the services available and UDDI is used for listing what services are accessible.
A web service is a unit of managed code that supports some sort of services to client applications or end users. This functionality can be enforced over the HTTP protocol which defines that it can also be enforced over the internet.
Web services enable different applications from different sources to communicate with each other without time-consuming custom programming, and because all communication is in XML. Web services are not fixed to any one operating system or programming language. For instance, Java can talk with Perl, Windows applications can talk with UNIX applications.
A Web service includes a service provider and a service requester (client). Because Web services feature language transparency, it doesn’t matter whether the basic system that supports the service is written in Java while the user is written in Perl, Python or Ruby.
For instance, through Web services a Windows server can communicate with a Linux server or serve an application to computer desktops, laptops or smart phones and multiple mobile devices over the World Wide Web.
In web services, it can provide data in a multiple formats, XML and JSON are the most common. These standard text-based formats can be simply identified and parsed by another program that receives the data. The most common web service protocol SOAP (Simple Object Access Protocol) simply inserts a header to each XML message before it is shared over HTTP.
Business-oriented web services can use a standard known as UDDI. This formats data in a definite type of XML known as the Web Services Description Language, or WSDL. While UDDI transmits WSDL files rather than standard XML files, it can use the SOAP protocol to transfer information.
Most web services supports an API, or a set of functions and commands, that can be used to access the information. For example, Twitter supports an API that enables developers to access tweets from the service and receive the information in JSON format. It can supports an API for programmers to access data about businesses, which can be displayed directly in an app or website. Google Maps supports an API for receiving geographical information and directions from the Google Maps database.
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