diff --git a/EncryptionTests/TokenValidation.cs b/EncryptionTests/TokenValidation.cs
index f61c22496485d41e01c71c9f242c928e9e931c13..ed2c617e20014238ba61781dba637e1d6ee42eec 100644
--- a/EncryptionTests/TokenValidation.cs
+++ b/EncryptionTests/TokenValidation.cs
@@ -1,3 +1,4 @@
+using System;
 using FitConnect.Encryption;
 using FluentAssertions;
 using NUnit.Framework;
@@ -15,13 +16,20 @@ public class TokenValidation {
                 "4Y0sJhadfrQnNZXeS7Pqh73FvtFPXLvLw11h7OiZM0DlqvRNgoYHO5k-kxJKOVCaFek0LjKM1_VQxMVpdChCkHeapdTg60oQTQZj3pG0boR3LStbqN3hNEx_JZC4aHH16kau0vqBBPiOOoq-ExUz-hXz_GMLsp9QVqIkw9okO_tzNPjQOo--GM8r4eSsKzgSHZzmepc9Gfk16eraGicBevlkclk32TmWIE_ErD31dtVbBlK-7GG2NUe-o_5rkiCJ2EwKRHZlLkBYJkkj_IjeUdKc4dawXoE8L83DSBPyapX47_L1VHTnT0hJdOVe6WHtvzzpusZ0Au-YDhp6LSwXnU9d0-VzBJmQvtrep1FM0d9aQrz0e0lVf8wCn13VdKO_FBZw9D7i0XRhF8JqQRblqhcCY7UGshbTTM8HORMFONHFmSQm10qfV29PLmztOhIuubMyYe1DPnlfRkpn5jnt8IPoopl6MliDKSc3m4dgG23KylBpTLr3U-XGQrTlerjrYh4t1LXiJ-jQhLefkak_WnExZJSXv601BgmbGj3GdIhS6lxdMX62cOuwKLVISOmHHxvimpQwhtYwiFR9OmGoKVgtCQ5eMKLwGWVwXSvUJ5YXH-yUyNW1_vOrt0DAtYmXwS_Ij0bMg9WoXKJ-5NtQpnnIzw1lr5bW5fNn2TgWpH")
             .Should().BeTrue();
     }
-
     [Test]
     public void TestTokenValidator_fail() {
+        Assert.Throws<Microsoft.IdentityModel.Tokens.SecurityTokenSignatureKeyNotFoundException>(()=>
         JoseEncryptor.CheckSignature(
-                "eyJraWQiOiJhZUJVaFFTOHVhSnZ0ek1jVHlpRUFOM0tXNG02NXVEbUwwWDFBQUlxZENFIiwidHlwIjoiSldUIiwiYWxnIjoiSFM1MTIifQ.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.4baeODaTtpx_iy81TsqF8l6VJu3tzgjJHm0h-tZAJgYfCnFMu5Kjg613Yt7YHeY-_BEnipVcMeeWnY15qOoqiQ",
-                "5Y0sJhadfrQnNZXeS7Pqh73FvtFPXLvLw11h7OiZM0DlqvRNgoYHO5k-kxJKOVCaFek0LjKM1_VQxMVpdChCkHeapdTg60oQTQZj3pG0boR3LStbqN3hNEx_JZC4aHH16kau0vqBBPiOOoq-ExUz-hXz_GMLsp9QVqIkw9okO_tzNPjQOo--GM8r4eSsKzgSHZzmepc9Gfk16eraGicBevlkclk32TmWIE_ErD31dtVbBlK-7GG2NUe-o_5rkiCJ2EwKRHZlLkBYJkkj_IjeUdKc4dawXoE8L83DSBPyapX47_L1VHTnT0hJdOVe6WHtvzzpusZ0Au-YDhp6LSwXnU9d0-VzBJmQvtrep1FM0d9aQrz0e0lVf8wCn13VdKO_FBZw9D7i0XRhF8JqQRblqhcCY7UGshbTTM8HORMFONHFmSQm10qfV29PLmztOhIuubMyYe1DPnlfRkpn5jnt8IPoopl6MliDKSc3m4dgG23KylBpTLr3U-XGQrTlerjrYh4t1LXiJ-jQhLefkak_WnExZJSXv601BgmbGj3GdIhS6lxdMX62cOuwKLVISOmHHxvimpQwhtYwiFR9OmGoKVgtCQ5eMKLwGWVwXSvUJ5YXH-yUyNW1_vOrt0DAtYmXwS_Ij0bMg9WoXKJ-5NtQpnnIzw1lr5bW5fNn2TgWpH")
-            .Should().BeFalse();
+                "eyJraWQiOiJhZUJVaFFTOHVhSnZ0ek1jVHlpRUFOM0tXNG02NXVEbUwwWDFBQUlxZENFIiwidHlwIjoiSldUIiwiYWxnIjoiSFM1MTIifQ.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.4baeODaTtpx_iy81TsqF8l6VJu3tzgjJHm0h-tZAJgYfCnFMu5Kjg613Yt7YHeY-_BEnipVcMeeWnY15qOoqiQ",
+                "4Y0sJhadfrQnNZXeS7Pqh73FvtFPXLvLw11h7OiZM0DlqvRNgoYHO5k-kxJKOVCaFek0LjKM1_VQxMVpdChCkHeapdTg60oQTQZj3pG0boR3LStbqN3hNEx_JZC4aHH16kau0vqBBPiOOoq-ExUz-hXz_GMLsp9QVqIkw9okO_tzNPjQOo--GM8r4eSsKzgSHZzmepc9Gfk16eraGicBevlkclk32TmWIE_ErD31dtVbBlK-7GG2NUe-o_5rkiCJ2EwKRHZlLkBYJkkj_IjeUdKc4dawXoE8L83DSBPyapX47_L1VHTnT0hJdOVe6WHtvzzpusZ0Au-YDhp6LSwXnU9d0-VzBJmQvtrep1FM0d9aQrz0e0lVf8wCn13VdKO_FBZw9D7i0XRhF8JqQRblqhcCY7UGshbTTM8HORMFONHFmSQm10qfV29PLmztOhIuubMyYe1DPnlfRkpn5jnt8IPoopl6MliDKSc3m4dgG23KylBpTLr3U-XGQrTlerjrYh4t1LXiJ-jQhLefkak_WnExZJSXv601BgmbGj3GdIhS6lxdMX62cOuwKLVISOmHHxvimpQwhtYwiFR9OmGoKVgtCQ5eMKLwGWVwXSvUJ5YXH-yUyNW1_vOrt0DAtYmXwS_Ij0bMg9WoXKJ-5NtQpnnIzw1lr5bW5fNn2TgWpH"));
+    }
+
+    [Test]
+    public void TestTokenValidator_exception() {
+        Assert.Throws<Microsoft.IdentityModel.Tokens.SecurityTokenSignatureKeyNotFoundException>(()=>
+        JoseEncryptor.CheckSignature(
+                "eyJraWQiOiJhZUJVaFFTOHVhSnZ0ek1jVHlpRUFOM0tXNG02NXVEbUwwWDFBQUlxZENFIiwidHlwIjoiSldUIiwiYWxnIjoiSFM1MTIifQ.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.4baeODaTtpx_iy81TsqF8l6VJu3tzgjJHm0h-tZAJgYfCnFMu5Kjg613Yt7YHeY-_BEnipVcMeeWnY15qOoqiQ",
+                "5Y0sJhadfrQnNZXeS7Pqh73FvtFPXLvLw11h7OiZM0DlqvRNgoYHO5k-kxJKOVCaFek0LjKM1_VQxMVpdChCkHeapdTg60oQTQZj3pG0boR3LStbqN3hNEx_JZC4aHH16kau0vqBBPiOOoq-ExUz-hXz_GMLsp9QVqIkw9okO_tzNPjQOo--GM8r4eSsKzgSHZzmepc9Gfk16eraGicBevlkclk32TmWIE_ErD31dtVbBlK-7GG2NUe-o_5rkiCJ2EwKRHZlLkBYJkkj_IjeUdKc4dawXoE8L83DSBPyapX47_L1VHTnT0hJdOVe6WHtvzzpusZ0Au-YDhp6LSwXnU9d0-VzBJmQvtrep1FM0d9aQrz0e0lVf8wCn13VdKO_FBZw9D7i0XRhF8JqQRblqhcCY7UGshbTTM8HORMFONHFmSQm10qfV29PLmztOhIuubMyYe1DPnlfRkpn5jnt8IPoopl6MliDKSc3m4dgG23KylBpTLr3U-XGQrTlerjrYh4t1LXiJ-jQhLefkak_WnExZJSXv601BgmbGj3GdIhS6lxdMX62cOuwKLVISOmHHxvimpQwhtYwiFR9OmGoKVgtCQ5eMKLwGWVwXSvUJ5YXH-yUyNW1_vOrt0DAtYmXwS_Ij0bMg9WoXKJ-5NtQpnnIzw1lr5bW5fNn2TgWpH"));
     }
 
     
diff --git a/FitConnect/Encryption/JoseEncryptor.cs b/FitConnect/Encryption/JoseEncryptor.cs
index 794f0cb56b2ca096634f7c20af4f8557fc5cd4af..f51b2f79acd45d8454cc2629b0b0c2d8dd241dc2 100644
--- a/FitConnect/Encryption/JoseEncryptor.cs
+++ b/FitConnect/Encryption/JoseEncryptor.cs
@@ -85,7 +85,12 @@ public class JoseEncryptor : IEncryptor {
         var tokenHandler = new JwtSecurityTokenHandler();
 
         var validationParameters = new TokenValidationParameters {
-            IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(key)),
+            IssuerSigningKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes(key)),
+            ValidateAudience = false,
+            ValidateIssuer = false,
+            ValidateIssuerSigningKey = false,
+            ValidateTokenReplay = false,
+            ValidateLifetime = false,
             ValidAlgorithms = new[] { SecurityAlgorithms.HmacSha512 },
         };