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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:
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What is 'public static void main (String args[ ] ) ' signifies? Access specifier is the 'public' keyword. 'static' keyword allows main() to called without instantiating
As registered nurses, we often wonder "am I responsible for the L.P.N's and the C.N.A. assigned on my floor. Will I be blamed if someone makes an error or if someone gets hurt? N
Question: (a) Discuss the Java approach to event processing by explaining how event handling works in Java. Use an example to support your answer. (b) Explain what is a ‘
Sequence diagrams are communication diagrams which detail what messages are sent and when. The sequence diagrams are placed according to time. The time performs as you move from to
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The software or script to scan automotive ads Project Description: Looking for a company that made the script or application to search through pages of listings of automotive
#question.Write a program that computes the edit distance (also called the Levenshtein distance, for its creator Vladimir Levenshtein) between two words. The edit distance between
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RMI uses a layered architecture; every of the layers could be increased or replaced without affecting the rest of the system. The details of layers can be summarised as follows:
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