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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Apr 27 23:31:46 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Package java.security</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-use.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.3</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../java/rmi/server/package-summary.html"><B>PREV PACKAGE</B></A> <A HREF="../../java/security/acl/package-summary.html"><B>NEXT PACKAGE</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="package-summary.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><H2>Package java.security</H2>Provides the classes and interfaces for the security framework.<P><B>See: </B><BR> <A HREF="#package_description"><B>Description</B></A><P><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Interface Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Certificate.html"><I>Certificate</I></A></B></TD><TD><B>Deprecated.</B> <I>A new certificate handling package is created in the Java 2 platform.</I></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="DomainCombiner.html"><I>DomainCombiner</I></A></B></TD><TD>A <code>DomainCombiner</code> provides a means to dynamically update the ProtectionDomains associated with the current <code>AccessControlContext</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Guard.html"><I>Guard</I></A></B></TD><TD> This interface represents a guard, which is an object that is used to protect access to another object.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Key.html"><I>Key</I></A></B></TD><TD>The Key interface is the top-level interface for all keys.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Principal.html"><I>Principal</I></A></B></TD><TD>This interface represents the abstract notion of a principal, which can be used to represent any entity, such as an individual, a corporation, and a login id.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="PrivateKey.html"><I>PrivateKey</I></A></B></TD><TD>A private key.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="PrivilegedAction.html"><I>PrivilegedAction</I></A></B></TD><TD>A computation to be performed with privileges enabled.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="PrivilegedExceptionAction.html"><I>PrivilegedExceptionAction</I></A></B></TD><TD>A computation to be performed with privileges enabled, that throws one or more checked exceptions.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="PublicKey.html"><I>PublicKey</I></A></B></TD><TD>A public key.</TD></TR></TABLE> <P><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="AccessControlContext.html">AccessControlContext</A></B></TD><TD>An AccessControlContext is used to make system resource access decisions based on the context it encapsulates.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="AccessController.html">AccessController</A></B></TD><TD> The AccessController class is used for three purposes: to decide whether an access to a critical system resource is to be allowed or denied, based on the security policy currently in effect,</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="AlgorithmParameterGenerator.html">AlgorithmParameterGenerator</A></B></TD><TD>The <code>AlgorithmParameterGenerator</code> class is used to generate a set of parameters to be used with a certain algorithm.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="AlgorithmParameterGeneratorSpi.html">AlgorithmParameterGeneratorSpi</A></B></TD><TD>This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for the <code>AlgorithmParameterGenerator</code> class, which is used to generate a set of parameters to be used with a certain algorithm.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="AlgorithmParameters.html">AlgorithmParameters</A></B></TD><TD>This class is used as an opaque representation of cryptographic parameters.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="AlgorithmParametersSpi.html">AlgorithmParametersSpi</A></B></TD><TD>This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for the <code>AlgorithmParameters</code> class, which is used to manage algorithm parameters.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="AllPermission.html">AllPermission</A></B></TD><TD>The AllPermission is a permission that implies all other permissions.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="BasicPermission.html">BasicPermission</A></B></TD><TD>The BasicPermission class extends the Permission class, and can be used as the base class for permissions that want to follow the same naming convention as BasicPermission.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="CodeSource.html">CodeSource</A></B></TD><TD>This class extends the concept of a codebase to encapsulate not only the location (URL) but also the certificate(s) that were used to verify signed code originating from that location.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="DigestInputStream.html">DigestInputStream</A></B></TD><TD>A transparent stream that updates the associated message digest using the bits going through the stream.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="DigestOutputStream.html">DigestOutputStream</A></B></TD><TD>A transparent stream that updates the associated message digest using the bits going through the stream.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="GuardedObject.html">GuardedObject</A></B></TD><TD>A GuardedObject is an object that is used to protect access to another object.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Identity.html">Identity</A></B></TD><TD><B>Deprecated.</B> <I>This class is no longer used.</I></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="IdentityScope.html">IdentityScope</A></B></TD><TD><B>Deprecated.</B> <I>This class is no longer used.</I></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="KeyFactory.html">KeyFactory</A></B></TD><TD>Key factories are used to convert <I>keys</I> (opaque cryptographic keys of type <code>Key</code>) into <I>key specifications</I> (transparent representations of the underlying key material), and vice versa.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="KeyFactorySpi.html">KeyFactorySpi</A></B></TD><TD>This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for the <code>KeyFactory</code> class.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="KeyPair.html">KeyPair</A></B></TD><TD>This class is a simple holder for a key pair (a public key and a private key).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="KeyPairGenerator.html">KeyPairGenerator</A></B></TD><TD>The KeyPairGenerator class is used to generate pairs of public and private keys.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="KeyPairGeneratorSpi.html">KeyPairGeneratorSpi</A></B></TD><TD> This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for the <code>KeyPairGenerator</code> class, which is used to generate pairs of public and private keys.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="KeyStore.html">KeyStore</A></B></TD><TD>This class represents an in-memory collection of keys and certificates.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="KeyStoreSpi.html">KeyStoreSpi</A></B></TD><TD>This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for the <code>KeyStore</code> class.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="MessageDigest.html">MessageDigest</A></B></TD><TD>This MessageDigest class provides applications the functionality of a message digest algorithm, such as MD5 or SHA.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="MessageDigestSpi.html">MessageDigestSpi</A></B></TD><TD>This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for the <code>MessageDigest</code> class, which provides the functionality of a message digest algorithm, such as MD5 or SHA.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Permission.html">Permission</A></B></TD><TD>Abstract class for representing access to a system resource.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="PermissionCollection.html">PermissionCollection</A></B></TD><TD>Abstract class representing a collection of Permission objects.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Permissions.html">Permissions</A></B></TD><TD>This class represents a heterogeneous collection of Permissions.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="Policy.html">Policy</A></B></TD><TD>This is an abstract class for representing the system security policy for a Java application environment (specifying which permissions are available for code from various 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