make keys more secure

build.gradle

@@ -39,14 +39,6 @@ javadoc {
                 new URL("https://raw.githubusercontent.com/TudbuT/tools/master/dark_javadoc.css").newInputStream().
                         readLines().join("\n").getBytes()
         ); f.close()
-    }
-}
-
-jar {
-    doLast {
-        File jar = new File("build/libs/tuddylib.jar")
-        File loc = new File("TuddyLIB.jar")
-        jar.renameTo(loc)
 
         ZipOutputStream out = new ZipOutputStream(new FileOutputStream("TuddyLIB-javadoc.zip"))
         new File("build/docs/javadoc").eachFileRecurse(groovy.io.FileType.FILES) {
@@ -60,6 +52,14 @@ jar {
     }
 }
 
+jar {
+    doLast {
+        File jar = new File("build/libs/tuddylib.jar")
+        File loc = new File("TuddyLIB.jar")
+        jar.renameTo(loc)
+    }
+}
+
 //jar.dependsOn("javadoc")
 
 publishing {

src/main/java/de/tudbut/tools/encryption/Key.java

@@ -5,6 +5,8 @@ import de.tudbut.tools.Hasher;
 import de.tudbut.tools.ObjectSerializerTCN;
 import de.tudbut.tools.Tools;
 
+import java.nio.charset.StandardCharsets;
+import java.security.SecureRandom;
 import java.util.Objects;
 
 /**
@@ -18,7 +20,7 @@ public class Key implements Cloneable {
      * Generates a random Key
      */
     public Key() {
-        string = Tools.randomAlphanumericString(1024);
+        this(SecureRandom.getSeed(1024));
     }
     
     /**
@@ -34,7 +36,7 @@ public class Key implements Cloneable {
      * @param bytes Key as byte[]
      */
     public Key(byte[] bytes) {
-        string = new String(bytes);
+        string = new String(bytes, StandardCharsets.ISO_8859_1);
     }
     
     /**