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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:
EJBs are distributed elements, which need the RMI framework for object distribution. An EJB application server gives more services like object pooling, transaction management, data
(CarbonFootprint Interface: Polymorphism) Using interfaces, as you learned in this chapter, you can specify similar behaviors for possibly disparate classes. Governments and compan
import java.text.NumberFormat; import java.util.Locale; public class Client { // instance data private String name; private long income_this_year; private double perce
two different object may have chance to have same behavier but property must be different why?
• Study and enhance the File System Simulator - See the FS_sim slide deck • New features - blockinfo - a new application that displays the information about the blocks in the file
what is the jaob of it
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Describe the Class or static Members ? A method or a field in a Java program could be declared static. That means the member belongs to the class rather than to an individual
Luminous Jewels - The Polishing Game Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various lum
programming challenges
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