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EJB elements operate inside a container environment and rely heavily on the container to give security. The four key services needed for the security are:
1. Identification: In Java security APIs this identifier is define as a principal.
2. Authentication: To show the identity one must present the credentials in the form of password, digital certificate, swipe card, finger prints etc.
3. Authorization (Access Control): Every secured system should limit access to particular users. The common route to enforce access control is by maintaining security privileges and roles.
4. Data Confidentiality: This is performed by encryption of some sort. It is no good to shield your data by authentication if someone may read the password.
The EJB specification services itself exclusively with authorization (access control). An application using EJB may specify in an abstract (declarative) and portable way that is allowed to access business functions. The EJB container accepts the following actions:
Describe methods of Basic Applet Life Cycle ? All applets have the subsequent four methods: public void init(); public void start(); public void stop(); public void destroy();
Design and implement a class called Sphere that contains instance data that represents the sphere''s diameter, and include getter and setter methods for the diameter. Include metho
Question: (a) Explain the event handling mechanism using a 'JComboBox' as example. Your answer must clearly indicate the event source, event object and event listener. Also
any one out there with Boggle Source code?......i really need it guys please.
The basic system has to offer the following options: 1. Exit the program 2. Enter new customer The program prompts for the details of a new customer, assigns a unique cust
Decode the Code Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new techn
Coarse Grained SOA : Services are also could be coarse grained. E.g: You may have a purchase element with individual functions to make a purchase order, add line items, and a
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JRMP(java remote method protocol)
write a program to find the area under thecurve y=f(x)between x=a and x=b, integrate y=f(x) between the limits of a and b. the area under a curve between two points can be found by
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