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affordable tomcat database affordable tomcat database MainFlow_wide @media print } h3, h4, h5 #ToggleLeft /t function leftBar() { var nameq = 'tutorial_showLeftBar=' var cookies = document.cookie.split(';'); for (var i = 0; i Download the JDK Search the Tutorials Hide the TOC Trail: Deployment Lesson: Packaging Programs in JAR Files Section: Signing and Verifying JAR Files Packaging Programs in JAR Files Using JAR Files: The Basics Creating a JAR File Viewing the Contents of a JAR File Extracting the Contents of a JAR File Updating a JAR File Running JAR-Packaged Software Working with Manifest Files: The Basics Understanding the Default Manifest Modifying a Manifest File Setting an Application's Entry Point Adding Classes to the JAR File's Classpath Setting Package Version Information Sealing Packages within a JAR File Signing and Verifying JAR Files Understanding Signing and Verification Signing JAR Files Verifying Signed JAR Files Using JAR-related APIs The JarClassLoader Class The JarRunner Class Home Page > Deployment > Packaging Programs in JAR Files « Previous • Trail • Next » Understanding Signing and Verification The JavaTM platform enables you to digitally sign JAR files. You digitally sign a file for the same reason you might sign a paper document with pen and ink -- to let readers know that you wrote the document, or at least that the document has your approval. When you sign a letter, for example, everyone who recognizes your signature can confirm that you wrote the letter.

affordable tomcat database Similarly when you digitally sign a file, anyone who "recognizes" your digital signature knows that the file came from you. The process of "recognizing" electronic signatures is called verification.The ability to sign and verify files is an important part of the Java platform's security architecture. Security is controlled by the security policy that's in force at runtime. You can configure the policy to grant security privileges to applets and to applications.

affordable tomcat database For example, you could grant permission to an applet to perform normally forbidden operations such as reading and writing local files or running local executable programs. If you have downloaded some code that's signed by a trusted entity, you can use that fact as a criterion in deciding which security permissions to assign to the code.Once you (or your browser) have verified that an applet is from a trusted source, you can have the platform relax security restrictions to let the applet perform operations that would ordinarily be forbidden. A trusted applet can have freedoms as specified by the policy file in force.The Java platform enables signing and verification by using special numbers called public and private keys.

affordable tomcat database Public keys and private keys come in pairs, and they play complementary roles. The private key is the electronic "pen" with which you can sign a file. As its name implies, your private key is known only to you so that no one else can "forge" your signature. A file signed with your private key can be verified only by the corresponding public key. Public and private keys alone, however, aren't enough to truly verify a signature.

affordable tomcat database

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affordable tomcat database