By Marco Pistoia
Java is trendy, yet is it trustworthy? Java is wonderful, yet is it safe? Java turns out to be useful, yet is it safe?The function of this booklet is to reply to these questions, from the perspective of people that are looking to use Java, yet are looking to accomplish that reliably, securely and properly. That makes this ebook diverse from a lot fresh writing on Java, which focuses, completely legitimately, on how a Java approach may be damaged into and the way to prevent these hazards. to the contrary, this booklet specializes in how Java should be made safe and the way to use its strengths. The aim is to supply functional support to some of the teams excited about creating a Java-based program or site into an industrial-strength advertisement proposition.Various teams have diverse wishes and assorted talents, which this booklet meets in its diversified elements. * the 1st half is geared toward the clever non-specialist who oversees approach administration or program improvement, or contains Java into the safety coverage. just a simple figuring out of pcs and a constrained publicity to Java is thought, yet all of the issues of Java defense are brought in a context that stresses over and over how Java safety needs to be obvious as an essential component of process safeguard. * the second one half is going into extra element on how Java safety works, and is aimed extra at approach and community directors and programmers, who want to know extra of what's occurring. * The 3rd half appears to be like on the broader context during which Java operates, together with a few extensions to Java safeguard and a few facets of its destiny. This ebook explains the evolution of the Java safety version, andthenfocuses at the Java 2 protection structure and its innovative domain names of safety. It bargains a really huge variety of examples to offer you a greater figuring out of the know-how concerned.
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Extra info for Java 2 Network Security
Example text
What if the program is not one you want to run... If it is stealing your cycles? The most extreme form of cycle stealing is a denial of service attack. The applet can use so much of the client’s machine time that it cannot perform its normal function. This is the Java equivalent of flooding a company with mail or with telephone calls; like those nuisances it cannot readily be prevented – all you can do is find out who is responsible and take action after the event. Less extreme examples of cycle stealing are the irksome, nuisance, applets.
Com/docs/books/jls/. Attack and Defense 41 2. Classes are defined as extending existing classes. This means that they can inherit the properties (variables and methods) of the higher (or super) class. They can also selectively override the properties of the super class. They also add new properties of their own. 3. Java identifies classes using the fully-qualified class name, that is, the combination of the package name and the class name. This allows you to have duplicated class names, such as our two Button classes.
If you do not modify the policy file properly, you will not be able to run the application correctly with the default security manager, because a security exception would be thrown. 8, “Modifying the Security Policy on the Client System” on page 20. 2\lib\security. The Policy Tool can be used to modify this policy file: Figure 16. 7 Running the Application with the Necessary Permission The java command can be launched against a JAR file, provided that the -jar option is specified. jar A button is shown similar to the one in Figure 15 on page 30.