... h3.Security Code Samples
Java technologies include APIs for signing and verifying signed data, encrypting and decrypting data, and writing a security manager. A security manager is a Java virtual machine (JVM ^1^) object that implements a security policy such as prompting an end user for password verification. However, for export reasons, code for encrypting and decrypting data cannot be shown on the Web.
* [#Java Cryptography Extension (JCE)]
* [#Java Web Start and Security]
* [#Signing and Verifying Signed Data]
* [#Writing a Security Manager]
h5.Java Cryptography Extension (JCE)
* [EncryptTest|http://java.sun.com/developer/technicalArticles/Security/securitychange/#code1] demonstrates the JCE API by encrypting and decrypting a series of objects. For supporting information see [Exploring the Security Changes of the J2SE Platform|http://java.sun.com/developer/technicalArticles/Security/securitychange/].
* [JSSE|http://java.sun.com/developer/technicalArticles/Security/securitychange/#code2]demonstrates the JSSE library by reading a Web page through port 443, which is the HTTPS port. For supporting information see [Exploring the Security Changes of the J2SE Platform|http://java.sun.com/developer/technicalArticles/Security/securitychange/].
h5.Java Web Start and Security
* [writeFile.java|http://java.sun.com/developer/technicalArticles/JavaLP/javawebstart/#code1] shows how to run an applet securely with Java Web Start. For supporting information see [Java Web Start to the Rescue|http://java.sun.com/developer/technicalArticles/JavaLP/javawebstart/].
* [writeFile.java|http://java.sun.com/developer/technicalArticles/JavaLP/javawebstart/#code2] is another version of an applet that uses Java Network Launch Protocol (JNLP) to write to a user-selected file. The applet is run securely with Java Web Start. For supporting information see [Java Web Start to the Rescue|http://java.sun.com/developer/technicalArticles/JavaLP/javawebstart/].
h5.Signing and Verifying Signed Data
* [GenSig.java|http://java.sun.com/docs/books/tutorial/security/apisign/examples/GenSig.java] shows how to generate a digital signature on data.
* [VerSig.java|http://java.sun.com/docs/books/tutorial/security/apisign/examples/VerSig.java] shows how to verify a digital signature on data.
h5.Writing a Security Manager
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