diff --git a/lab3/zad2/app/src/main/java/pl/jacekpoz/User.java b/lab3/zad2/app/src/main/java/pl/jacekpoz/User.java
index 6cb43f5..54dd073 100644
--- a/lab3/zad2/app/src/main/java/pl/jacekpoz/User.java
+++ b/lab3/zad2/app/src/main/java/pl/jacekpoz/User.java
@@ -10,7 +10,7 @@ public class User<T extends IGF, D extends IDHSetup<T>> {
 
     public User(final IDHSetup<T> dh) {
         Random rand = new Random();
-        this.secret = rand.nextLong(0, Long.MAX_VALUE);
+        this.secret = rand.nextLong(0, dh.getGenerator().getCharacteristic());
 
         this.dh = dh;
     }