diff --git a/scm-core/src/main/java/sonia/scm/ClientMessages.java b/scm-core/src/main/java/sonia/scm/ClientMessages.java
new file mode 100644
index 0000000000..d03bb34fad
--- /dev/null
+++ b/scm-core/src/main/java/sonia/scm/ClientMessages.java
@@ -0,0 +1,103 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import javax.servlet.http.HttpServletRequest;
+import sonia.scm.i18n.I18nMessages;
+
+//~--- JDK imports ------------------------------------------------------------
+
+
+/**
+ * I18n messages which are send back to client.
+ *
+ * @author Sebastian Sdorra
+ * @since 1.37
+ */
+public final class ClientMessages
+{
+
+  /**
+   * Constructs a new instance of ClientMessages. This constructor should not be 
+   * used. Use the {@link #get(javax.servlet.http.HttpServletRequest)} method 
+   * instead.
+   */
+  public ClientMessages() {}
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Returns the localized string for a failed authentication.
+   *
+   *
+   * @return localized string
+   */
+  public String failedAuthentication()
+  {
+    return failedAuthentication;
+  }
+
+  /**
+   * Returns the localized string for "not enough privileges.
+   *
+   *
+   * @return localized string
+   */
+  public String notEnoughPrivileges()
+  {
+    return notEnoughPrivileges;
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Returns an instance {@link ClientMessages}.
+   *
+   * @param request servlet request
+   * 
+   * @return instance of client messages
+   */
+  public static ClientMessages get(HttpServletRequest request)
+  {
+    return I18nMessages.get(ClientMessages.class, request);
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** failed authentication */
+  private String failedAuthentication;
+
+  /** not enough privileges */
+  private String notEnoughPrivileges;
+}
diff --git a/scm-core/src/main/resources/sonia/scm/ClientMessages.properties b/scm-core/src/main/resources/sonia/scm/ClientMessages.properties
new file mode 100644
index 0000000000..9141761056
--- /dev/null
+++ b/scm-core/src/main/resources/sonia/scm/ClientMessages.properties
@@ -0,0 +1,31 @@
+# Copyright (c) 2010, Sebastian Sdorra
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# 
+# 1. Redistributions of source code must retain the above copyright notice,
+#    this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+# 3. Neither the name of SCM-Manager; nor the names of its
+#    contributors may be used to endorse or promote products derived from this
+#    software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# 
+# http://bitbucket.org/sdorra/scm-manager
+# 
+
+failedAuthentication = Invalid username or password.
+notEnoughPrivileges = You do not have enough access privileges for this operation.
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