diff --git a/update/org.eclipse.update.core/src/org/eclipse/update/core/Site.java b/update/org.eclipse.update.core/src/org/eclipse/update/core/Site.java
index 773fce8..5b05116 100644
--- a/update/org.eclipse.update.core/src/org/eclipse/update/core/Site.java
+++ b/update/org.eclipse.update.core/src/org/eclipse/update/core/Site.java
@@ -302,7 +302,7 @@
 						IPluginEntry[] pluginEntries = features[indexFeatures].getFeature().getPluginEntries();
 						if (pluginEntries != null) {
 							for (int indexEntries = 0; indexEntries < pluginEntries.length; indexEntries++) {
-								allPluginID.add(entries[indexEntries].getVersionedIdentifier());
+								allPluginID.add(pluginEntries[indexEntries].getVersionedIdentifier());
 							}
 						}
 					}
diff --git a/update/org.eclipse.update.core/src/org/eclipse/update/internal/core/messages.properties b/update/org.eclipse.update.core/src/org/eclipse/update/internal/core/messages.properties
index 8388867..9f468c9 100644
--- a/update/org.eclipse.update.core/src/org/eclipse/update/internal/core/messages.properties
+++ b/update/org.eclipse.update.core/src/org/eclipse/update/internal/core/messages.properties
@@ -151,9 +151,11 @@
 SiteLocal.UnableToSaveStateIn=																		Unable to persist configurations into {0}.
 SiteLocal.UnableToResolve=																				Internal Error.Unable to resolve {0}.
 
-JarVerifier.InvalidJarFile=																					The file '{0}' is not a valid JAR file.
 JarVerifier.Verify=																								Verifying :
-
+JarVerifier.UnableToFindEncryption=																Unable to find algorithm to verify integrity of keystore {0}.
+JarVerifier.UnableToLoadCertificate=																Unable to load one or multiples certificates in the keystore {0}.
+JarVerifier.UnableToFindProviderForKeystore=												Unable to find provider for the keystore type {0}.
+JarVerifier.KeyStoreNotLoaded=																		Internal Error. KeyStore not Initialized / Loaded.
 
 JarVerificationDialog.Verification=																		Verification
 JarVerificationDialog.AboutToInstall=																You are about to install an unsigned feature
@@ -173,8 +175,21 @@
 JarVerificationDialog.InstallCertificate=																Always trust this certificate 
 JarVerificationDialog.Install=																				Install Feature
 JarVerificationDialog.Cancel=																			Cancel Feature Instalation
+JarVerificationDialog.KnownCertificate=															One of the certificates used to authenticate this feature was recognized
+JarVerificationDialog.ProviderKnown=																The provider of this feature has been validated by a third party trusted certificate.
+JarVerificationDialog.Caution=																			Only install if you trust both the signer and the third party certificates.
+JarVerificationDialog.RootCA=																			Third Party Trusted Certificate
+JarVerificationDialog.CAIssuer=																			Certificate Issuer : {0}.
+JarVerificationDialog.ValidBetween=																	Valid between {0} and {1}.
+JarVerificationDialog.SubjectCA=																		Certificate used to sign the feature.
+JarVerificationDialog.DoYouTrustCertificate=													Do you want to always trust this certificate when installing this feature ?
+JarVerificationDialog.ExpiredCertificate=															* EXPIRED CERTIFICATE *
+JarVerificationDialog.CertificateNotYetValid=													* CERTIFICATE NOT YET VALID *
+JarVerificationDialog.CertificateValid=																Valid certificate.
 
-JarVerificationService.ErrorVerification=															Error occurred during verification
-JarVerificationService.VerificationCanceled=													Verification cancelled
-JarVerificationService.UnsucessfulVerification=												Verification of feature unsucessful. Install canceled
-JarVerificationService.ErrorDuringVerification=													Error during verification. Install canceled
+JarVerificationService.ErrorVerification=															Error occurred during verification.
+JarVerificationService.VerificationCanceled=													Verification cancelled.
+JarVerificationService.UnsucessfulVerification=												Verification of feature unsucessful. Installation cancelled.
+JarVerificationService.ErrorDuringVerification=													Error during verification. Installation cancelled.
+JarVerificationService.CancelInstall=																Installation cancelled.
+
diff --git a/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerification.java b/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerification.java
new file mode 100644
index 0000000..d94a923
--- /dev/null
+++ b/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerification.java
@@ -0,0 +1,26 @@
+
+package org.eclipse.update.internal.security;
+/*
+ * (c) Copyright IBM Corp. 2000, 2002.
+ * All Rights Reserved.
+ */
+ 
+/**
+ * 
+ */
+public interface JarVerification {
+	
+	
+	public static final int JAR_NOT_SIGNED = 0;
+	public static final int JAR_CORRUPTED = 1;
+	public static final int JAR_INTEGRITY_VERIFIED = 2;
+	public static final int JAR_SOURCE_VERIFIED = 3;
+	public static final int UNKNOWN_ERROR = 4;
+	public static final int VERIFICATION_CANCELLED = 5;
+
+	public static final int ASK_USER = -1;
+	public static final int CANCEL_INSTALL = 0;
+	public static final int ERROR_INSTALL = 1;
+	public static final int OK_TO_INSTALL = 2;
+
+}
diff --git a/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerificationResult.java b/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerificationResult.java
index 8ce58ba..e22268f 100644
--- a/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerificationResult.java
+++ b/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerificationResult.java
@@ -15,10 +15,6 @@
  */
 public class JarVerificationResult {
 
-	public static final int ASK_USER = -1;
-	public static final int CANCEL_INSTALL = 0;
-	public static final int ERROR_INSTALL = 1;
-	public static final int OK_TO_INSTALL = 2;
 
 	private int resultCode;
 	private int verificationCode;
@@ -88,6 +84,7 @@
 	 */
 	public CertificatePair[] getRootCertificates() {
 		if (rootCertificates == null) {
+			rootCertificates = new CertificatePair[0];			
 			List rootCertificatesList = new ArrayList();
 			if (certificates != null && certificates.size() > 0) {
 				Iterator iter = certificates.iterator();
@@ -123,9 +120,9 @@
 				}
 
 			}
-
+			
 			if (rootCertificatesList.size() > 0) {
-				rootCertificates = new CertificatePair[certificates.size()];
+				rootCertificates = new CertificatePair[certificates.size()];				
 				rootCertificatesList.toArray(rootCertificates);
 			}
 		}
diff --git a/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerifier.java b/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerifier.java
index 0fc37fd..4ce7a24 100644
--- a/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerifier.java
+++ b/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/JarVerifier.java
@@ -50,12 +50,6 @@
 	private String jarFileName;
 
 	//RESULT VALUES
-	public static final int NOT_SIGNED = 0;
-	public static final int CORRUPTED = 1;
-	public static final int INTEGRITY_VERIFIED = 2;
-	public static final int SOURCE_VERIFIED = 3;
-	public static final int UNKNOWN_ERROR = 4;
-	public static final int VERIFICATION_CANCELLED = 5;
 
 	/**
 	 * Default Constructor
@@ -69,10 +63,8 @@
 		this.monitor = monitor;
 	}
 	/**
-	 * Returns the list of certificates of the keystore.
+	 * Returns the list of the keystores.
 	 *
-	 * Can be optimize, within an operation, we only need to get the
-	 * list of certificate once.
 	 */
 	private List getKeyStores() throws CoreException {
 		if (listOfKeystores == null) {
@@ -80,20 +72,20 @@
 			KeyStores listOfKeystoreHandles = new KeyStores();
 			InputStream in = null;
 			KeyStore keystore = null;
+			KeystoreHandle handle = null;
 			while (listOfKeystoreHandles.hasNext()) {
 				try {
-					KeystoreHandle handle = listOfKeystoreHandles.next();
+					handle = listOfKeystoreHandles.next();
 					in = handle.getLocation().openStream();
 					try {
 						keystore = KeyStore.getInstance(handle.getType());
 						keystore.load(in, null); // no password
 					} catch (NoSuchAlgorithmException e) {
-						throw newCoreException("Unable to find encryption algorithm", e);
-
+						throw newCoreException(Policy.bind("JarVerifier.UnableToFindEncryption",handle.getLocation().toExternalForm()), e); //$NON-NLS-1$
 					} catch (CertificateException e) {
-						throw newCoreException("Unable to load a certificate in the keystore", e);
+						throw newCoreException(Policy.bind("JarVerifier.UnableToLoadCertificate",handle.getLocation().toExternalForm()), e); //$NON-NLS-1$
 					} catch (KeyStoreException e) {
-						throw newCoreException("Unable to find provider for the keystore type", e);
+						throw newCoreException(Policy.bind("JarVerifier.UnableToFindProviderForKeystore",handle.getType()), e); //$NON-NLS-1$
 					} finally {
 						if (in != null) {
 							try {
@@ -121,17 +113,14 @@
 	 */
 	private void initializeVariables(File jarFile) throws IOException {
 		result = new JarVerificationResult();
-		result.setVerificationCode(UNKNOWN_ERROR);
-		result.setResultCode(JarVerificationResult.ASK_USER);
-		result.setResultException(
-			new Exception(
-				Policy.bind("JarVerifier.InvalidJarFile", jarFile.getAbsolutePath())));
-		//$NON-NLS-1$
+		result.setVerificationCode(JarVerification.UNKNOWN_ERROR);
+		result.setResultCode(JarVerification.ASK_USER);
+		result.setResultException(null);
 		JarFile jar = new JarFile(jarFile);
 		entries = jar.size();
 		try {
 			jar.close();
-		} catch (java.io.IOException ex) {
+		} catch (IOException ex) {
 			// unchecked
 		}
 		jarFileName = jarFile.getName();
@@ -153,7 +142,7 @@
 				}
 			}
 		} catch (KeyStoreException e) {
-			throw newCoreException("KeyStore not loaded", e);
+			throw newCoreException(Policy.bind("JarVerifier.KeyStoreNotLoaded"), e); //$NON-NLS-1$
 		}
 		return false;
 	}
@@ -168,8 +157,7 @@
 		byte[] buffer = new byte[4096];
 		JarEntry ent;
 		if (monitor != null)
-			monitor.beginTask(Policy.bind("JarVerifier.Verify", jarFileName), entries);
-		//$NON-NLS-1$ //$NON-NLS-2$
+			monitor.beginTask(Policy.bind("JarVerifier.Verify", jarFileName), entries);//$NON-NLS-1$ //$NON-NLS-2$
 		try {
 			while ((ent = jis.getNextJarEntry()) != null) {
 				list.add(ent);
@@ -180,7 +168,7 @@
 				}
 			}
 		} catch (IOException e) {
-			result.setVerificationCode(UNKNOWN_ERROR);
+			result.setVerificationCode(JarVerification.UNKNOWN_ERROR);
 			result.setResultException(e);
 		} finally {
 			if (monitor != null)
@@ -228,11 +216,11 @@
 			// as verifyIntegrity already did it
 
 			// verify source certificate
-			if (result.getVerificationCode() == INTEGRITY_VERIFIED)
+			if (result.getVerificationCode() == JarVerification.JAR_INTEGRITY_VERIFIED)
 				verifyAuthentication();
 
 		} catch (Exception e) {
-			result.setVerificationCode(UNKNOWN_ERROR);
+			result.setVerificationCode(JarVerification.UNKNOWN_ERROR);
 			result.setResultException(e);
 		}
 
@@ -256,7 +244,7 @@
 		for (int i = 0; i < entries.length; i++) {
 			certificateFound = existsInKeystore(entries[i].getRoot());
 			if (certificateFound) {
-				result.setVerificationCode(SOURCE_VERIFIED);
+				result.setVerificationCode(JarVerification.JAR_SOURCE_VERIFIED);
 				result.setFoundCertificate(entries[i]);
 				return;
 			}
@@ -293,18 +281,18 @@
 				}
 
 				if (certificateFound)
-					result.setVerificationCode(INTEGRITY_VERIFIED);
+					result.setVerificationCode(JarVerification.JAR_INTEGRITY_VERIFIED);
 				else
-					result.setVerificationCode(NOT_SIGNED);
+					result.setVerificationCode(JarVerification.JAR_NOT_SIGNED);
 			}
 		} catch (SecurityException e) {
 			// Jar file is signed
 			// but content has changed since signed
-			result.setVerificationCode(CORRUPTED);
+			result.setVerificationCode(JarVerification.JAR_CORRUPTED);
 		} catch (InterruptedException e) {
-			result.setVerificationCode(VERIFICATION_CANCELLED);
+			result.setVerificationCode(JarVerification.VERIFICATION_CANCELLED);
 		} catch (Exception e) {
-			result.setVerificationCode(UNKNOWN_ERROR);
+			result.setVerificationCode(JarVerification.UNKNOWN_ERROR);
 			result.setResultException(e);
 		} finally {
 			if (jis != null) {
diff --git a/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/KeyStores.java b/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/KeyStores.java
index d7893b3..cd7c0f4 100644
--- a/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/KeyStores.java
+++ b/update/org.eclipse.update.core/src/org/eclipse/update/internal/security/KeyStores.java
Binary files differ
diff --git a/update/org.eclipse.update.ui/src/org/eclipse/update/internal/ui/security/JarVerificationDialog.java b/update/org.eclipse.update.ui/src/org/eclipse/update/internal/ui/security/JarVerificationDialog.java
index 5d0d6f7..a913590 100644
--- a/update/org.eclipse.update.ui/src/org/eclipse/update/internal/ui/security/JarVerificationDialog.java
+++ b/update/org.eclipse.update.ui/src/org/eclipse/update/internal/ui/security/JarVerificationDialog.java
@@ -6,6 +6,8 @@
 
 import java.io.File;
 import java.security.cert.Certificate;
+import java.security.cert.CertificateExpiredException;
+import java.security.cert.CertificateNotYetValidException;
 import java.security.cert.X509Certificate;
 
 import org.eclipse.jface.dialogs.Dialog;
@@ -17,20 +19,23 @@
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.update.internal.security.CertificatePair;
+import org.eclipse.update.internal.security.JarVerification;
 import org.eclipse.update.internal.security.JarVerificationResult;
 import org.eclipse.update.internal.security.JarVerifier;
+import sun.security.x509.X500Name;
 import org.eclipse.update.internal.core.Policy;
 
 public class JarVerificationDialog extends Dialog {
-	protected JarVerificationResult _VerificationResult = null;
-	protected File _file = null;
-	protected String _strComponentName = null;
-	protected String _strId = null;
-	protected String _strProviderName = null;
-	protected Button _buttonInstall;
-	protected Button _buttonCancel;
-	protected Button _buttonInstallCertificate;
-	public static boolean COMPONENT_TO_INSTALL = false;
+	private JarVerificationResult _VerificationResult = null;
+	private File _file = null;
+	private String _strComponentName = null;
+	private String _strId = null;
+	private String _strProviderName = null;
+	private Button _buttonInstall;
+	private Button _buttonCancel;
+	private Button _buttonTrustCertificate;
+	private CertificatePair trustedCertificate = null;
+	private boolean okToInstall = false;	
 	/**
 	 *
 	 */
@@ -47,9 +52,14 @@
 		_strId = strId;
 		_strComponentName = strComponentName;
 		_strProviderName = strProviderName;
+		trustedCertificate = null;
+		okToInstall = false;
 	}
 	public boolean close() {
-		COMPONENT_TO_INSTALL = okToInstall();
+		okToInstall =( _buttonInstall != null ? _buttonInstall.getSelection() : false);
+		if (_buttonTrustCertificate== null || !_buttonTrustCertificate.getSelection()){
+			trustedCertificate = null;
+		}
 		return super.close();
 	}
 	/**
@@ -63,8 +73,7 @@
 	 * of the dialog (above the button bar).
 	 */
 	protected Control createDialogArea(Composite compositeParent) {
-		getShell().setText(Policy.bind("JarVerificationDialog.Verification"));
-		//$NON-NLS-1$
+		getShell().setText(Policy.bind("JarVerificationDialog.Verification"));//$NON-NLS-1$
 		// Composite: Client
 		//------------------
 		Composite compositeClient = new Composite(compositeParent, SWT.NULL);
@@ -79,53 +88,45 @@
 			new GridData(GridData.GRAB_VERTICAL | GridData.FILL_HORIZONTAL));
 		StringBuffer strb = new StringBuffer();
 		switch (_VerificationResult.getVerificationCode()) {
-			case JarVerifier.NOT_SIGNED :
-				strb.append(Policy.bind("JarVerificationDialog.AboutToInstall"));
-				//$NON-NLS-1$
+			case JarVerification.JAR_NOT_SIGNED :
+				strb.append(Policy.bind("JarVerificationDialog.AboutToInstall"));//$NON-NLS-1$
 				strb.append("\n\n"); //$NON-NLS-1$
-				strb.append(Policy.bind("JarVerificationDialog.NotDigitallySigned"));
-				//$NON-NLS-1$
+				strb.append(Policy.bind("JarVerificationDialog.NotDigitallySigned"));//$NON-NLS-1$
 				strb.append("\n"); //$NON-NLS-1$
-				strb.append(Policy.bind("JarVerificationDialog.CannotVerifyProvider"));
-				//$NON-NLS-1$
+				strb.append(Policy.bind("JarVerificationDialog.CannotVerifyProvider"));//$NON-NLS-1$
 				strb.append("\n"); //$NON-NLS-1$
 				strb.append(Policy.bind("JarVerificationDialog.MayCorrupt")); //$NON-NLS-1$ 
 				textInformation.setText(strb.toString());
 				break;
-			case JarVerifier.CORRUPTED :
-				strb.append(Policy.bind("JarVerificationDialog.CorruptedContent"));
-				//$NON-NLS-1$
+			case JarVerification.JAR_CORRUPTED :
+				strb.append(Policy.bind("JarVerificationDialog.CorruptedContent"));//$NON-NLS-1$
 				strb.append("\n\n"); //$NON-NLS-1$
-				strb.append(Policy.bind("JarVerificationDialog.ComponentNotInstalled"));
-				//$NON-NLS-1$
+				strb.append(Policy.bind("JarVerificationDialog.ComponentNotInstalled"));//$NON-NLS-1$
 				textInformation.setText(strb.toString());
 				break;
-			case JarVerifier.INTEGRITY_VERIFIED :
-				strb.append(Policy.bind("JarVerificationDialog.SignedComponent"));
-				//$NON-NLS-1$
+			case JarVerification.JAR_INTEGRITY_VERIFIED :
+				strb.append(Policy.bind("JarVerificationDialog.SignedComponent"));//$NON-NLS-1$
 				strb.append("\n\n"); //$NON-NLS-1$
-				strb.append(Policy.bind("JarVerificationDialog.UnknownCertificate"));
-				//$NON-NLS-1$
+				strb.append(Policy.bind("JarVerificationDialog.UnknownCertificate"));//$NON-NLS-1$
 				strb.append("\n"); //$NON-NLS-1$
-				strb.append(Policy.bind("JarVerificationDialog.UnableToVerifyProvider"));
-				//$NON-NLS-1$ //
+				strb.append(Policy.bind("JarVerificationDialog.UnableToVerifyProvider"));//$NON-NLS-1$ 
 				strb.append("\n"); //$NON-NLS-1$
 				strb.append(Policy.bind("JarVerificationDialog.MayCorrupt")); //$NON-NLS-1$ 
 				textInformation.setText(strb.toString());
 				break;
-			case JarVerifier.SOURCE_VERIFIED :
-				strb.append(Policy.bind("JarVerificationDialog.SignedComponent")); //$NON-NLS-1$
+			case JarVerification.JAR_SOURCE_VERIFIED :
+				strb.append(Policy.bind("JarVerificationDialog.SignedComponent"));//$NON-NLS-1$
 				strb.append("\n\n"); //$NON-NLS-1$
-				strb.append("JarVerificationDialog.knownCertificate"); 
+				strb.append(Policy.bind("JarVerificationDialog.KnownCertificate")); //$NON-NLS-1$
 				strb.append("\n"); //$NON-NLS-1$
-				strb.append("JarVerificationDialog.ProviderKnown");
+				strb.append(Policy.bind("JarVerificationDialog.ProviderKnown")); //$NON-NLS-1$
 				strb.append("\n"); //$NON-NLS-1$
-				strb.append(Policy.bind("JarVerificationDialog.MayCorrupt")); //$NON-NLS-1$ 
+				strb.append(Policy.bind("JarVerificationDialog.Caution"));  //$NON-NLS-1$
 				textInformation.setText(strb.toString());
 				break;
 		}
-		if (_VerificationResult.getVerificationCode() == JarVerifier.INTEGRITY_VERIFIED
-			|| _VerificationResult.getVerificationCode() == JarVerifier.SOURCE_VERIFIED) {
+		if (_VerificationResult.getVerificationCode() == JarVerification.JAR_INTEGRITY_VERIFIED
+			|| _VerificationResult.getVerificationCode() == JarVerification.JAR_SOURCE_VERIFIED) {
 			addCertificateView(compositeClient);
 		}
 		// Composite: Information labels
@@ -154,8 +155,7 @@
 		//---------------------
 		if (_strId != null && _strId.length() > 0) {
 			label = new Label(compositeInformation, SWT.NULL);
-			label.setText(Policy.bind("JarVerificationDialog.FeatureIdentifier"));
-			//$NON-NLS-1$
+			label.setText(Policy.bind("JarVerificationDialog.FeatureIdentifier"));//$NON-NLS-1$
 			label = new Label(compositeInformation, SWT.NULL);
 			label.setText(_strId);
 		}
@@ -167,7 +167,7 @@
 			label = new Label(compositeInformation, SWT.NULL);
 			label.setText(_strProviderName);
 		}
-		if (_VerificationResult.getVerificationCode() != JarVerifier.CORRUPTED) {
+		if (_VerificationResult.getVerificationCode() != JarVerification.JAR_CORRUPTED) {
 			// Group box
 			//----------
 			Group group = new Group(compositeClient, SWT.NONE);
@@ -178,19 +178,16 @@
 			//------------------
 			Text textInstruction = new Text(group, SWT.MULTI | SWT.READ_ONLY);
 			textInstruction.setText(
-				Policy.bind("JarVerificationDialog.MayChooseToInstall"));
-			//$NON-NLS-1$
+				Policy.bind("JarVerificationDialog.MayChooseToInstall"));//$NON-NLS-1$
 			// Radio button: Install
 			//----------------------
 			_buttonInstall = new Button(group, SWT.RADIO);
-			_buttonInstall.setText(Policy.bind("JarVerificationDialog.Install"));
-			//$NON-NLS-1$
+			_buttonInstall.setText(Policy.bind("JarVerificationDialog.Install"));//$NON-NLS-1$
 			_buttonInstall.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 			// Radio button: Cancel installation
 			//----------------------------------
 			_buttonCancel = new Button(group, SWT.RADIO);
-			_buttonCancel.setText(Policy.bind("JarVerificationDialog.Cancel"));
-			//$NON-NLS-1$
+			_buttonCancel.setText(Policy.bind("JarVerificationDialog.Cancel"));//$NON-NLS-1$
 			_buttonCancel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 			_buttonCancel.setSelection(true);
 		}
@@ -201,48 +198,83 @@
 	 * called by the Wizard when Finish is executed.
 	 */
 	public boolean okToInstall() {
-		return _buttonInstall != null ? _buttonInstall.getSelection() : false;
+		return okToInstall;
 	}
 
+
 	private void addCertificateView(Composite compositeClient) {
-		CertificatePair pair = null;
 		X509Certificate certRoot = null;
 		X509Certificate certIssuer = null;
 		if (_VerificationResult.getFoundCertificate() == null) {
 			CertificatePair[] certs = _VerificationResult.getRootCertificates();
-			if (certs.length == 0)	return;
-			pair = (CertificatePair)certs[0];
+			if (certs.length == 0)
+				return;
+			trustedCertificate = (CertificatePair) certs[0];
 		} else {
-			pair = (CertificatePair) _VerificationResult.getFoundCertificate();
+			trustedCertificate = (CertificatePair) _VerificationResult.getFoundCertificate();
 		}
-			certRoot = (X509Certificate) pair.getRoot();
-			certIssuer = (X509Certificate) pair.getIssuer();			
+		certRoot = (X509Certificate) trustedCertificate.getRoot();
+		certIssuer = (X509Certificate) trustedCertificate.getIssuer();
 
 
+			// Group box
+			//----------
+			Group group = new Group(compositeClient, SWT.NONE);
+			group.setLayout(new GridLayout());
+			group.setLayoutData(
+				new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_VERTICAL));
+
 		// Text: Information
 		//------------------
 		Text textInformation =
-			new Text(compositeClient, SWT.WRAP | SWT.READ_ONLY | SWT.MULTI);
+			new Text(group, SWT.WRAP | SWT.READ_ONLY | SWT.MULTI);
 		textInformation.setLayoutData(
 			new GridData(GridData.GRAB_VERTICAL | GridData.FILL_HORIZONTAL));
 		StringBuffer strb = new StringBuffer();
-		strb.append("JarVerificationDialog.RootCA");
+		strb.append(Policy.bind("JarVerificationDialog.RootCA")); //$NON-NLS-1$
 		strb.append("\n"); //$NON-NLS-1$
-		strb.append("JarVerificationDialog.CAVersion " + certRoot.getVersion());
+		strb.append(Policy.bind("JarVerificationDialog.CAIssuer", certRoot.getIssuerDN().toString())); //$NON-NLS-1$
 		strb.append("\n"); //$NON-NLS-1$
-		strb.append("JarVerificationDialog.CAIssuer " + certRoot.getIssuerDN().getName());
+		strb.append(Policy.bind("JarVerificationDialog.ValidBetween" ,certRoot.getNotBefore().toString(),certRoot.getNotAfter().toString())); //$NON-NLS-1$ 
+		strb.append(checkValidity(certRoot));	
+		strb.append("\n\n"); //$NON-NLS-1$	
+		strb.append(Policy.bind("JarVerificationDialog.SubjectCA")); //$NON-NLS-1$
 		strb.append("\n"); //$NON-NLS-1$
-		strb.append("valid between: " + certRoot.getNotBefore().toLocaleString()+" and " +certRoot.getNotAfter().toLocaleString());
-		strb.append("\n\n"); //$NON-NLS-1$		
-		strb.append("JarVerificationDialog.IssuerCA");
+		strb.append(Policy.bind("JarVerificationDialog.CAIssuer",certIssuer.getSubjectDN().toString())); //$NON-NLS-1$
 		strb.append("\n"); //$NON-NLS-1$
-		strb.append("JarVerificationDialog.CAVersion " + certIssuer.getVersion());
-		strb.append("\n"); //$NON-NLS-1$
-		strb.append("JarVerificationDialog.CAIssuer " + certIssuer.getIssuerDN().getName());
-		strb.append("\n"); //$NON-NLS-1$
-		strb.append("valid between: " + certIssuer.getNotBefore().toLocaleString()+" and " +certIssuer.getNotAfter().toLocaleString());
+		strb.append(Policy.bind("JarVerificationDialog.ValidBetween",certIssuer.getNotBefore().toString(),certIssuer.getNotAfter().toString())); //$NON-NLS-1$
+		strb.append(checkValidity(certRoot));
 		strb.append("\n\n"); //$NON-NLS-1$				
 		textInformation.setText(strb.toString());
 
+		// CheckBox button: trust
+		//----------------------
+		_buttonTrustCertificate = new Button(group, SWT.CHECK);
+		_buttonTrustCertificate.setText(	Policy.bind("JarVerificationDialog.DoYouTrustCertificate")); //$NON-NLS-1$
+		_buttonTrustCertificate.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
+
 	}
+	
+	
+	private String checkValidity(X509Certificate cert){
+		
+		try {
+			cert.checkValidity();
+		} catch (CertificateExpiredException e){
+			return ("\n"+Policy.bind("JarVerificationDialog.ExpiredCertificate")); //$NON-NLS-1$ 
+		} catch (CertificateNotYetValidException e){
+			return ("\n"+Policy.bind("JarVerificationDialog.CertificateNotYetValid"));			 //$NON-NLS-1$ 
+		}
+		return ("\n"+Policy.bind("JarVerificationDialog.CertificateValid"));			 //$NON-NLS-1$
+	}
+	
+	/**
+	 * Gets the trustedCertificate.
+	 * @return Returns a CertificatePair
+	 */
+	public CertificatePair getCertificate() {
+		return trustedCertificate;
+	}
+
+	
 }
\ No newline at end of file
diff --git a/update/org.eclipse.update.ui/src/org/eclipse/update/internal/ui/security/JarVerificationService.java b/update/org.eclipse.update.ui/src/org/eclipse/update/internal/ui/security/JarVerificationService.java
index 0d6afb7..7fba23c 100644
--- a/update/org.eclipse.update.ui/src/org/eclipse/update/internal/ui/security/JarVerificationService.java
+++ b/update/org.eclipse.update.ui/src/org/eclipse/update/internal/ui/security/JarVerificationService.java
@@ -14,6 +14,8 @@
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.update.core.*;
 import org.eclipse.update.internal.core.UpdateManagerPlugin;
+import org.eclipse.update.internal.security.CertificatePair;
+import org.eclipse.update.internal.security.JarVerification;
 import org.eclipse.update.internal.security.JarVerificationResult;
 import org.eclipse.update.internal.security.JarVerifier;
 import org.eclipse.update.internal.core.Policy;
@@ -41,6 +43,12 @@
 	 * the Shell
 	 */
 	private Shell shell;
+
+	/**
+	 * 
+	 */
+	private CertificatePair trustedCertificate = null;
+
 	/**
 	 * If no shell, create a new shell 
 	 */
@@ -83,24 +91,42 @@
 	 * returns an JarVerificationResult
 	 * The monitor can be null.
 	 */
-	private JarVerificationResult okToInstall(final File jarFile, final String id, final String featureName, final String providerName, InstallMonitor monitor) {
+	private JarVerificationResult okToInstall(
+		final File jarFile,
+		final String id,
+		final String featureName,
+		final String providerName,
+		InstallMonitor monitor) {
 
 		jarVerifier.setMonitor(monitor);
-		result= jarVerifier.verify(jarFile);
+		result = jarVerifier.verify(jarFile);
 
 		switch (getResult().getResultCode()) {
-			case JarVerifier.UNKNOWN_ERROR :
+			case JarVerification.UNKNOWN_ERROR :
 				{
-					getResult().setResultCode(JarVerificationResult.ERROR_INSTALL);					
+					getResult().setResultCode(JarVerification.ERROR_INSTALL);
 					break;
 				}
-			case JarVerifier.VERIFICATION_CANCELLED :
+			case JarVerification.VERIFICATION_CANCELLED :
 				{
-					getResult().setResultCode(JarVerificationResult.CANCEL_INSTALL);							
+					getResult().setResultCode(JarVerification.CANCEL_INSTALL);
 					break;
 				}
+
 			default :
 				{
+
+					if (trustedCertificate != null) {
+						// check if this is not a user accepted certificate for this feature
+						CertificatePair[] pairs = getResult().getRootCertificates();
+						for (int i = 0; i < pairs.length; i++) {
+							if (trustedCertificate.equals(pairs[i])) {
+								getResult().setResultCode(JarVerification.OK_TO_INSTALL);
+								return getResult();
+							}
+						}
+					}
+					
 					shell.getDisplay().syncExec(new Runnable() {
 						public void run() {
 							getResult().setResultCode(openWizard(jarFile, id, featureName, providerName));
@@ -114,55 +140,82 @@
 	/**
 	 * 
 	 */
-	private int openWizard(File jarFile, String id, String componentName, String providerName) {
+	private int openWizard(
+		File jarFile,
+		String id,
+		String componentName,
+		String providerName) {
 
 		int code;
 
-		//	JarVerifierWizard wizard = new JarVerifierWizard(jarFile, componentName, verificationResult);
-		//	WizardDialog dialog = new WizardDialog(shell, wizard);
-
-		JarVerificationDialog dialog = new JarVerificationDialog(shell, id, componentName, providerName, jarFile, result);
+		JarVerificationDialog dialog =
+			new JarVerificationDialog(
+				shell,
+				id,
+				componentName,
+				providerName,
+				jarFile,
+				result);
 		dialog.open();
 
-		if (JarVerificationDialog.COMPONENT_TO_INSTALL)
-			code = JarVerificationResult.OK_TO_INSTALL;
+		trustedCertificate = dialog.getCertificate();
+
+		if (dialog.okToInstall())
+			code = JarVerification.OK_TO_INSTALL;
 		else
-			code = JarVerificationResult.CANCEL_INSTALL;
+			code = JarVerification.CANCEL_INSTALL;
 
 		return code;
-	
+
 	}
-	
+
 	/*
 	 * @see IFeatureVerification#verify(IFeature feature,ContentReference[], InstallMonitor)
 	 */
-	public void verify(IFeature feature,ContentReference[] references, InstallMonitor monitor) throws CoreException {
-		if (references==null || references.length==0) return ;
-		
+	public void verify(
+		IFeature feature,
+		ContentReference[] references,
+		InstallMonitor monitor)
+		throws CoreException {
+		if (references == null || references.length == 0)
+			return;
+
 		try {
-		for (int i = 0; i < references.length; i++) {
-			if (references[i] instanceof JarContentReference){
-				JarContentReference jarReference = (JarContentReference)references[i];
-				result = okToInstall(jarReference.asFile(),feature.getVersionedIdentifier().toString(),feature.getLabel(),feature.getProvider(),monitor);
-				if (result.getResultCode()==JarVerificationResult.CANCEL_INSTALL){
-					throw newCoreException(Policy.bind("JarVerificationService.CancelInstall"),result.getResultException()); //$NON-NLS-1$
+			for (int i = 0; i < references.length; i++) {
+				if (references[i] instanceof JarContentReference) {
+					JarContentReference jarReference = (JarContentReference) references[i];
+					result =
+						okToInstall(
+							jarReference.asFile(),
+							feature.getVersionedIdentifier().toString(),
+							feature.getLabel(),
+							feature.getProvider(),
+							monitor);
+					if (result.getResultCode() == JarVerification.CANCEL_INSTALL) {
+						throw newCoreException(
+							Policy.bind("JarVerificationService.CancelInstall"), 	//$NON-NLS-1$
+							result.getResultException());
+					}
+					if (result.getResultCode() == JarVerification.ERROR_INSTALL) {
+						throw newCoreException(
+							Policy.bind("JarVerificationService.UnsucessfulVerification"),	//$NON-NLS-1$
+							result.getResultException());
+					}
 				}
-				if (result.getResultCode()==JarVerificationResult.ERROR_INSTALL){
-					throw newCoreException(Policy.bind("JarVerificationService.UnsucessfulVerification"),result.getResultException()); //$NON-NLS-1$
-				}				
 			}
-		}
-		} catch (IOException e){
-					throw newCoreException(Policy.bind("JarVerificationService.ErrorDuringVerification"),e);			 //$NON-NLS-1$
+		} catch (IOException e) {
+			throw newCoreException(Policy.bind("JarVerificationService.ErrorDuringVerification"),e); 	//$NON-NLS-1$
 		}
 	}
 
 	/**
 	 * 
 	 */
-	private CoreException newCoreException(String s, Throwable e) throws CoreException {
-		String id = UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
-		return new CoreException(new Status(IStatus.ERROR,id,0,s,e));
-	}	
+	private CoreException newCoreException(String s, Throwable e)
+		throws CoreException {
+		String id =
+			UpdateManagerPlugin.getPlugin().getDescriptor().getUniqueIdentifier();
+		return new CoreException(new Status(IStatus.ERROR, id, 0, s, e));
+	}
 
 }
\ No newline at end of file