diff --git a/GPW_Data/licenzeGPW.cs b/GPW_Data/licenzeGPW.cs
index 504ec1a..130f79a 100644
--- a/GPW_Data/licenzeGPW.cs
+++ b/GPW_Data/licenzeGPW.cs
@@ -1,16 +1,15 @@
-using SteamWare;
-using System;
+using Newtonsoft.Json;
 using RestSharp;
-using RestSharp.Authenticators;
-using System.Threading.Tasks;
-using Newtonsoft.Json;
+using SteamWare;
+using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
 using System.Web;
 using static GPW_data.LiManObj;
-using System.Text;
-using System.Security.Cryptography;
-using System.Diagnostics;
 
 namespace GPW_data
 {
@@ -24,20 +23,36 @@ namespace GPW_data
         //protected static string apiUrl = "https://localhost:44351/";
         protected static string apiUrl = "https://liman.egalware.com/ELM.API/";
 
-        /// <summary>
-        /// Durata cache statica locale dati licenza
-        /// protected static int LicCacheTTL = 60 * 60 * 24 * 7;
-        /// </summary>
-        protected static int LicCacheTTL = 120;
-
         protected static string rkeyActInfo = memLayer.ML.redHash($"LiMan:ActInfo");
+
         protected static string rkeyAppInfo = memLayer.ML.redHash($"LiMan:AppInfo");
+
         protected static string rkeyLicInfo = memLayer.ML.redHash($"LiMan:LicInfo");
+
         protected static string rkeyPayload = memLayer.ML.redHash($"LiMan:Payload");
+
         protected static string rkeyVetoRefPayL = memLayer.ML.redHash($"LiMan:VetoRefPayL");
 
         #endregion Protected Fields
 
+        #region Protected Properties
+
+        /// <summary>
+        /// Durata cache statica locale dati licenza, random circa 1 h
+        /// </summary>
+        protected static int LicCacheTTL
+        {
+            get
+            {
+                Random rndGen = new Random();
+                int minVal = 50;
+                int maxVal = 70;
+                return rndGen.Next(minVal, maxVal) * 60;
+            }
+        }
+
+        #endregion Protected Properties
+
         #region Public Properties
 
         /// <summary>
@@ -132,6 +147,7 @@ namespace GPW_data
                         var okAct = RefreshLicInfo().Result;
                         var okPld = RefreshPayload().Result;
 
+                        // evito ricalcolo x 5 sec...
                         memLayer.ML.setRSV(rkeyVetoRefPayL, "Veto", 5);
                         sw.Stop();
                         logger.lg.scriviLog($"Trovato payload non valido, effettuato reset variabili in {sw.ElapsedMilliseconds} ms");
@@ -369,7 +385,7 @@ namespace GPW_data
                 if (string.IsNullOrEmpty(currPayload))
                 {
                     currPayload = calcPayload();
-                    memLayer.ML.setRSV(rkeyPayload, currPayload, 3600);
+                    memLayer.ML.setRSV(rkeyPayload, currPayload, LicCacheTTL);
                 }
                 // confronto payload calc con quello della licenza
                 answ = InfoApplicativo.Payload == currPayload;
@@ -586,7 +602,7 @@ namespace GPW_data
         public static async Task<bool> RefreshPayload()
         {
             bool answ = false;
-            // svuoto payload calcolato in primis...
+            // svuoto payload calcolato in primis (ttl a 1 sec)...
             memLayer.ML.setRSV(rkeyPayload, "", 1);
 
             // cerco online