Index: trunk/src/org/openstreetmap/josm/data/cache/JCSCachedTileLoaderJob.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/cache/JCSCachedTileLoaderJob.java	(revision 10184)
+++ trunk/src/org/openstreetmap/josm/data/cache/JCSCachedTileLoaderJob.java	(revision 10185)
@@ -5,8 +5,8 @@
 import java.io.IOException;
 import java.net.URL;
+import java.security.SecureRandom;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Random;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
@@ -346,5 +346,5 @@
             for (int i = 0; i < 5; ++i) {
                 if (urlConn.getResponseCode() == HttpURLConnection.HTTP_UNAVAILABLE) {
-                    Thread.sleep(5000L+(new Random()).nextInt(5000));
+                    Thread.sleep(5000L+new SecureRandom().nextInt(5000));
                     continue;
                 }