diff --git a/.gitignore b/.gitignore
index 4e82b22..2f99ee3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,7 +6,7 @@ padelclub_backend/settings_local.py
 
 myenv/
 
-tournaments/config_local.py
+shared/config_local.py
 
 # Byte-compiled / optimized / DLL files
 __pycache__/
diff --git a/api/serializers.py b/api/serializers.py
index ec03749..d5b44f3 100644
--- a/api/serializers.py
+++ b/api/serializers.py
@@ -9,9 +9,23 @@ from django.utils.http import urlsafe_base64_encode, urlsafe_base64_decode
 from django.utils.encoding import force_bytes
 from django.core.mail import EmailMessage
 from django.contrib.sites.shortcuts import get_current_site
-
 from api.tokens import account_activation_token
 
+from shared.cryptography import encryption_util
+
+class EncryptedUserField(serializers.Field):
+    def to_representation(self, value):
+        # Encrypt data when sending it out
+        return encryption_util.encrypt_aes_gcm(str(value.id))
+
+    def to_internal_value(self, data):
+        # Decrypt data when receiving it
+        decrypted_user_id = encryption_util.decrypt_aes_gcm(data)
+        user = CustomUser.objects.get(id=decrypted_user_id)
+        if decrypted_user_id is None:
+            raise serializers.ValidationError("Invalid encrypted data")
+        return user
+
 class UserSerializer(serializers.ModelSerializer):
 
     password = serializers.CharField(write_only=True)
@@ -53,6 +67,7 @@ class UserSerializer(serializers.ModelSerializer):
             bracket_match_format_preference=validated_data.get('bracket_match_format_preference'),
             group_stage_match_format_preference=validated_data.get('group_stage_match_format_preference'),
             loser_bracket_match_format_preference=validated_data.get('loser_bracket_match_format_preference'),
+            loser_bracket_mode=validated_data.get('loser_bracket_mode'),
         )
 
         self.send_email(self.context['request'], user)
@@ -153,6 +168,8 @@ class PlayerRegistrationSerializer(serializers.ModelSerializer):
         # ['id', 'team_registration_id', 'first_name', 'last_name', 'licence_id', 'rank', 'has_paid']
 
 class PurchaseSerializer(serializers.ModelSerializer):
+    user = EncryptedUserField()
+
     class Meta:
         model = Purchase
         fields = '__all__'
diff --git a/api/views.py b/api/views.py
index b8d93d2..acda60c 100644
--- a/api/views.py
+++ b/api/views.py
@@ -107,8 +107,16 @@ class PurchaseViewSet(viewsets.ModelViewSet):
             return self.queryset.filter(user=self.request.user)
         return []
 
-    def put(self, request, pk):
-        raise MethodNotAllowed('PUT')
+    def create(self, request, *args, **kwargs):
+        id = request.data.get('id')
+        if Purchase.objects.filter(id=id).exists():
+            return Response({"detail": "This transaction id is already registered."}, status=status.HTTP_208_ALREADY_REPORTED)
+
+        serializer = self.get_serializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        self.perform_create(serializer)
+        headers = self.get_success_headers(serializer.data)
+        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
 
     def patch(self, request, pk):
         raise MethodNotAllowed('PATCH')
diff --git a/shared/cryptography.py b/shared/cryptography.py
new file mode 100644
index 0000000..1ca41d4
--- /dev/null
+++ b/shared/cryptography.py
@@ -0,0 +1,51 @@
+from Crypto.Cipher import AES
+import base64
+import os
+from .config_local import CRYPTO_KEY
+
+class EncryptionUtil:
+
+    def __init__(self, key):
+        # In a real application, store this key securely (e.g., environment variables)
+        self.crypto_key = key
+
+    def encrypt_aes_gcm(self, plaintext):
+        # Decode the base64 encoded key
+        key = base64.b64decode(self.crypto_key)
+
+        # Generate a random 12-byte nonce
+        nonce = os.urandom(12)
+
+        # Create the cipher object
+        cipher = AES.new(key, AES.MODE_GCM, nonce=nonce)
+
+        # Encrypt the plaintext
+        ciphertext, tag = cipher.encrypt_and_digest(plaintext.encode('utf-8'))
+
+        # Combine nonce, ciphertext, and tag
+        encrypted_data = nonce + ciphertext + tag
+
+        # Encode the result in base64
+        encrypted_base64 = base64.b64encode(encrypted_data).decode('utf-8')
+
+        return encrypted_base64
+
+    def decrypt_aes_gcm(self, encrypted_base64):
+        # Decode the base64 encoded data and key
+        encrypted_data = base64.b64decode(encrypted_base64)
+        key = base64.b64decode(self.crypto_key)
+
+        # Extract the nonce, tag, and ciphertext from the combined encrypted data
+        nonce = encrypted_data[:12]        # AES GCM nonce is 12 bytes
+        tag = encrypted_data[-16:]         # AES GCM tag is 16 bytes
+        ciphertext = encrypted_data[12:-16] # Ciphertext is everything in between
+
+        # Create the cipher object and decrypt the data
+        cipher = AES.new(key, AES.MODE_GCM, nonce=nonce)
+        decrypted_data = cipher.decrypt_and_verify(ciphertext, tag)
+
+        # Convert decrypted bytes to string (assuming UTF-8 encoding)
+        decrypted_text = decrypted_data.decode('utf-8')
+        return decrypted_text
+
+encryption_util = EncryptionUtil(CRYPTO_KEY)
diff --git a/tournaments/admin.py b/tournaments/admin.py
index 3d14e54..a272866 100644
--- a/tournaments/admin.py
+++ b/tournaments/admin.py
@@ -23,7 +23,7 @@ class CustomUserAdmin(UserAdmin):
             'summons_message_body', 'summons_message_signature', 'summons_available_payment_methods',
             'summons_display_format', 'summons_display_entry_fee', 'summons_use_full_custom_message',
             'match_formats_default_duration', 'bracket_match_format_preference', 'group_stage_match_format_preference',
-            'loser_bracket_match_format_preference', 'device_id'
+            'loser_bracket_match_format_preference', 'device_id', 'loser_bracket_mode'
         ]}),
         ]
     add_fieldsets = [
@@ -60,6 +60,7 @@ class RoundAdmin(admin.ModelAdmin):
 class PlayerRegistrationAdmin(admin.ModelAdmin):
     list_display = ['first_name', 'last_name', 'licence_id', 'rank']
     search_fields = ('first_name', 'last_name')
+    list_filter = [TeamScoreTournamentListFilter]
 
 class MatchAdmin(admin.ModelAdmin):
     list_display = ['__str__', 'round', 'group_stage', 'start_date', 'index']
@@ -74,7 +75,8 @@ class ClubAdmin(admin.ModelAdmin):
     search_fields = ('name', 'acronym')
 
 class PurchaseAdmin(admin.ModelAdmin):
-    list_display = ['user', 'identifier', 'product_id', 'quantity', 'purchase_date', 'revocation_date']
+    list_display = ['id', 'user', 'product_id', 'quantity', 'purchase_date', 'revocation_date', 'expiration_date']
+    list_filter = ['user']
 
 class CourtAdmin(admin.ModelAdmin):
     list_display = ['index', 'name', 'club']
diff --git a/tournaments/migrations/0082_alter_purchase_identifier_and_more.py b/tournaments/migrations/0082_alter_purchase_identifier_and_more.py
new file mode 100644
index 0000000..0310ea3
--- /dev/null
+++ b/tournaments/migrations/0082_alter_purchase_identifier_and_more.py
@@ -0,0 +1,23 @@
+# Generated by Django 5.1 on 2024-09-16 08:20
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tournaments', '0081_round_group_stage_loser_bracket'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='purchase',
+            name='identifier',
+            field=models.BigIntegerField(unique=True),
+        ),
+        migrations.AlterField(
+            model_name='tournament',
+            name='federal_age_category',
+            field=models.IntegerField(choices=[(0, ''), (120, 'U12'), (140, 'U14'), (160, 'U16'), (180, 'U18'), (200, 'Senior'), (450, '+45 ans'), (550, '+55 ans')], default=200),
+        ),
+    ]
diff --git a/tournaments/migrations/0083_purchase_expiration_date.py b/tournaments/migrations/0083_purchase_expiration_date.py
new file mode 100644
index 0000000..d97750f
--- /dev/null
+++ b/tournaments/migrations/0083_purchase_expiration_date.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.1 on 2024-09-16 13:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tournaments', '0082_alter_purchase_identifier_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='purchase',
+            name='expiration_date',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+    ]
diff --git a/tournaments/migrations/0084_customuser_loser_bracket_mode_and_more.py b/tournaments/migrations/0084_customuser_loser_bracket_mode_and_more.py
new file mode 100644
index 0000000..8c6f69b
--- /dev/null
+++ b/tournaments/migrations/0084_customuser_loser_bracket_mode_and_more.py
@@ -0,0 +1,28 @@
+# Generated by Django 4.2.11 on 2024-09-18 08:58
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tournaments', '0083_purchase_expiration_date'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='customuser',
+            name='loser_bracket_mode',
+            field=models.IntegerField(default=0),
+        ),
+        migrations.AddField(
+            model_name='round',
+            name='loser_bracket_mode',
+            field=models.IntegerField(default=0),
+        ),
+        migrations.AddField(
+            model_name='tournament',
+            name='loser_bracket_mode',
+            field=models.IntegerField(default=0),
+        ),
+    ]
diff --git a/tournaments/migrations/0084_remove_purchase_id_alter_purchase_identifier.py b/tournaments/migrations/0084_remove_purchase_id_alter_purchase_identifier.py
new file mode 100644
index 0000000..36fcb03
--- /dev/null
+++ b/tournaments/migrations/0084_remove_purchase_id_alter_purchase_identifier.py
@@ -0,0 +1,22 @@
+# Generated by Django 5.1 on 2024-09-18 08:33
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tournaments', '0083_purchase_expiration_date'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='purchase',
+            name='id',
+        ),
+        migrations.AlterField(
+            model_name='purchase',
+            name='identifier',
+            field=models.BigIntegerField(primary_key=True, serialize=False, unique=True),
+        ),
+    ]
diff --git a/tournaments/migrations/0085_rename_identifier_purchase_id.py b/tournaments/migrations/0085_rename_identifier_purchase_id.py
new file mode 100644
index 0000000..2de4b5b
--- /dev/null
+++ b/tournaments/migrations/0085_rename_identifier_purchase_id.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.1 on 2024-09-18 08:34
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tournaments', '0084_remove_purchase_id_alter_purchase_identifier'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='purchase',
+            old_name='identifier',
+            new_name='id',
+        ),
+    ]
diff --git a/tournaments/migrations/0086_merge_20240919_1142.py b/tournaments/migrations/0086_merge_20240919_1142.py
new file mode 100644
index 0000000..07e4b71
--- /dev/null
+++ b/tournaments/migrations/0086_merge_20240919_1142.py
@@ -0,0 +1,14 @@
+# Generated by Django 5.1 on 2024-09-19 09:42
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tournaments', '0084_customuser_loser_bracket_mode_and_more'),
+        ('tournaments', '0085_rename_identifier_purchase_id'),
+    ]
+
+    operations = [
+    ]
diff --git a/tournaments/models/custom_user.py b/tournaments/models/custom_user.py
index a05a246..5f6ecdf 100644
--- a/tournaments/models/custom_user.py
+++ b/tournaments/models/custom_user.py
@@ -30,6 +30,7 @@ class CustomUser(AbstractUser):
     loser_bracket_match_format_preference = models.IntegerField(default=enums.FederalMatchCategory.NINE_GAMES, choices=enums.FederalMatchCategory.choices, null=True, blank=True)
 
     device_id = models.CharField(max_length=50, null=True, blank=True)
+    loser_bracket_mode = models.IntegerField(default=0)
 
     ### ### ### ### ### ### ### ### ### ### ### WARNING ### ### ### ### ### ### ### ### ### ###
     ### WARNING : Any added field MUST be inserted in the method below: fields_for_update() ###
@@ -42,7 +43,7 @@ class CustomUser(AbstractUser):
             'summons_message_body', 'summons_message_signature', 'summons_available_payment_methods',
             'summons_display_format', 'summons_display_entry_fee',
             'summons_use_full_custom_message', 'match_formats_default_duration', 'bracket_match_format_preference',
-            'group_stage_match_format_preference', 'loser_bracket_match_format_preference', 'device_id']
+            'group_stage_match_format_preference', 'loser_bracket_match_format_preference', 'device_id', 'loser_bracket_mode']
 
     def __str__(self):
         return self.username
diff --git a/tournaments/models/purchase.py b/tournaments/models/purchase.py
index 6dc72e4..014a15e 100644
--- a/tournaments/models/purchase.py
+++ b/tournaments/models/purchase.py
@@ -3,13 +3,13 @@ import uuid
 from . import CustomUser
 
 class Purchase(models.Model):
-    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=True)
+    id = models.BigIntegerField(primary_key=True, unique=True, editable=True)
     user = models.ForeignKey(CustomUser, on_delete=models.CASCADE)
-    identifier = models.BigIntegerField()
     purchase_date = models.DateTimeField()
     product_id = models.CharField(max_length=100)
     quantity = models.IntegerField(null=True, blank=True)
     revocation_date = models.DateTimeField(null=True, blank=True)
+    expiration_date = models.DateTimeField(null=True, blank=True)
 
     def __str__(self):
-        return f"{self.identifier} > {self.product_id} - {self.purchase_date} - {self.user.username}"
+        return f"{self.id} > {self.product_id} - {self.purchase_date} - {self.user.username}"
diff --git a/tournaments/models/round.py b/tournaments/models/round.py
index 3c5eb2e..4f5a348 100644
--- a/tournaments/models/round.py
+++ b/tournaments/models/round.py
@@ -10,6 +10,7 @@ class Round(models.Model):
     format = models.IntegerField(default=FederalMatchCategory.NINE_GAMES, choices=FederalMatchCategory.choices, null=True, blank=True)
     start_date = models.DateTimeField(null=True, blank=True)
     group_stage_loser_bracket = models.BooleanField(default=False)
+    loser_bracket_mode = models.IntegerField(default=0)
 
     def __str__(self):
         if self.parent:
diff --git a/tournaments/models/tournament.py b/tournaments/models/tournament.py
index 586105d..063a7a0 100644
--- a/tournaments/models/tournament.py
+++ b/tournaments/models/tournament.py
@@ -7,8 +7,7 @@ from . import Event, TournamentPayment, FederalMatchCategory, FederalCategory, F
 import uuid
 from django.utils import timezone, formats
 from datetime import datetime, timedelta
-from .. import config_local
-from ..utils.cryptography import decrypt_aes_gcm
+from shared.cryptography import encryption_util
 from ..utils.extensions import plural_format
 
 class TeamSortingType(models.IntegerChoices):
@@ -59,6 +58,7 @@ class Tournament(models.Model):
     publish_tournament = models.BooleanField(default=False)
     hide_points_earned = models.BooleanField(default=False)
     publish_rankings = models.BooleanField(default=False)
+    loser_bracket_mode = models.IntegerField(default=0)
 
     def __str__(self):
         if self.name:
@@ -67,8 +67,8 @@ class Tournament(models.Model):
             return self.display_name()
 
     def is_canceled(self):
-        if self.local_id and config_local.CRYPTO_KEY:
-            decrypted = decrypt_aes_gcm(self.local_id, config_local.CRYPTO_KEY)
+        if self.local_id:
+            decrypted = encryption_util.decrypt_aes_gcm(self.local_id)
             value = int(decrypted[18])
             if 0 <= value <= 4:
                 return True
@@ -78,8 +78,8 @@ class Tournament(models.Model):
             return False
 
     def payment(self):
-        if self.global_id and config_local.CRYPTO_KEY:
-            decrypted = decrypt_aes_gcm(self.global_id, config_local.CRYPTO_KEY)
+        if self.global_id:
+            decrypted = encryption_util.decrypt_aes_gcm(self.global_id)
             value = int(decrypted[18])
             return TournamentPayment(value)
         else:
@@ -91,6 +91,18 @@ class Tournament(models.Model):
         else:
             return self.base_name()
 
+    def broadcast_display_name(self):
+        if self.name:
+            return self.short_base_name() + " " + self.name
+        else:
+            return self.base_name()
+
+    def broadcast_event_display_name(self):
+        if self.event is not None:
+            return self.event.display_name()
+        else:
+            return " "
+
     def base_name(self):
         return f"{self.level()} {self.category()}"
 
diff --git a/tournaments/signals.py b/tournaments/signals.py
index ded9d54..a5ae266 100644
--- a/tournaments/signals.py
+++ b/tournaments/signals.py
@@ -8,7 +8,7 @@ from .models import Club, FailedApiCall, CustomUser, Log
 import requests
 
 def generate_unique_code():
-    characters = string.ascii_letters + string.digits
+    characters = string.ascii_lowercase + string.digits
     while True:
         code = ''.join(random.sample(characters, 3))
         if not Club.objects.filter(broadcast_code=code).exists():
diff --git a/tournaments/templates/tournaments/broadcast/broadcasted_auto.html b/tournaments/templates/tournaments/broadcast/broadcasted_auto.html
index 74cdf64..6888cc7 100644
--- a/tournaments/templates/tournaments/broadcast/broadcasted_auto.html
+++ b/tournaments/templates/tournaments/broadcast/broadcasted_auto.html
@@ -37,7 +37,7 @@
             paginatedGroupStages: null,
             paginatedSummons: null,
             active: 1,
-            title: '',
+            prefixTitle: '',
             retrieveData() {
                 fetch('/tournament/{{ tournament.id }}/broadcast/json/')
                     .then(res => res.json())
@@ -45,7 +45,7 @@
                         this.paginatedMatches = this.paginate(data.matches, 8)
                         this.paginatedGroupStages = this.paginate(data.group_stages, 4)
                         this.paginatedSummons = this.paginateSummons(data.summons)
-                        this.setTitle()
+                        this.setPrefixTitle()
                     })
             },
             paginateSummons(array) {
@@ -76,19 +76,19 @@
                 setInterval(() => {
                     this.retrieveData()
                     this.active = this.active === this.pageCount() ? 1 : this.active+1
-                    this.setTitle()
+                    this.setPrefixTitle()
                 }, 15000)
             },
             pageCount() {
                 return this.paginatedMatches.length + this.paginatedGroupStages.length + this.paginatedSummons.length
             },
-            setTitle() {
+            setPrefixTitle() {
                 if (this.active < 1 + this.paginatedSummons.length) {
-                    this.title = 'Convocations'
+                    this.prefixTitle = 'Convocations'
                 } else if (this.active < 1 + this.paginatedSummons.length + this.paginatedMatches.length) {
-                    this.title = 'Matchs'
+                    this.prefixTitle = 'Matchs'
                 } else {
-                    this.title = 'Poules'
+                    this.prefixTitle = 'Poules'
                 }
             }
 
@@ -104,8 +104,8 @@
                                     class="logo inline"
                                 />
                                 <div class="inline">
-                                    <h1 class="club">{{ tournament.display_name }}</h1>
-                                    <h1 class="event"><span x-text="title"></span></h1>
+                                    <h1 class="club">{{ tournament.broadcast_event_display_name }}</h1>
+                                    <h1 class="event"><span x-text="prefixTitle"></span> {{ tournament.broadcast_display_name }}</h1>
                                     <!-- <span>Propulsé par Padel Club</span> -->
                                 </div>
                             </div>
diff --git a/tournaments/templates/tournaments/broadcast/broadcasted_group_stages.html b/tournaments/templates/tournaments/broadcast/broadcasted_group_stages.html
index 7af7d40..69b7028 100644
--- a/tournaments/templates/tournaments/broadcast/broadcasted_group_stages.html
+++ b/tournaments/templates/tournaments/broadcast/broadcasted_group_stages.html
@@ -67,8 +67,8 @@
                 <div class="left-content bubble">
                     <img src="{% static 'tournaments/images/PadelClub_logo_512.png' %}" alt="logo" class="logo">
                     <div class="left-margin">
-                        <h1 class="club">{{ tournament.display_name }}</h1>
-                        <h1 class="event">Poules</h1>
+                        <h1 class="club">{{ tournament.broadcast_event_display_name }}</h1>
+                        <h1 class="event">Poules {{ tournament.broadcast_display_name }}</h1>
                     </div>
                 </div>
                 <div class="right-content">{% qr_from_text qr_code_url options=qr_code_options %}</div>
diff --git a/tournaments/templates/tournaments/broadcast/broadcasted_matches.html b/tournaments/templates/tournaments/broadcast/broadcasted_matches.html
index 9718077..57db0a0 100644
--- a/tournaments/templates/tournaments/broadcast/broadcasted_matches.html
+++ b/tournaments/templates/tournaments/broadcast/broadcasted_matches.html
@@ -67,8 +67,8 @@
                 <div class="left-content bubble">
                     <img src="{% static 'tournaments/images/PadelClub_logo_512.png' %}" alt="logo" class="logo">
                     <div class="left-margin">
-                        <h1 class="club">{{ tournament.display_name }}</h1>
-                        <h1 class="event">Matchs</h1>
+                        <h1 class="club">{{ tournament.broadcast_event_display_name }}</h1>
+                        <h1 class="event">Matchs {{ tournament.broadcast_display_name }}</h1>
                     </div>
                 </div>
                 <div class="right-content">{% qr_from_text qr_code_url options=qr_code_options %}</div>
diff --git a/tournaments/templates/tournaments/broadcast/broadcasted_rankings.html b/tournaments/templates/tournaments/broadcast/broadcasted_rankings.html
index 237d821..ed4ef95 100644
--- a/tournaments/templates/tournaments/broadcast/broadcasted_rankings.html
+++ b/tournaments/templates/tournaments/broadcast/broadcasted_rankings.html
@@ -1,8 +1,8 @@
 {% extends 'tournaments/broadcast/broadcast_base.html' %}
 
 {% block head_title %}Classement{% endblock %}
-{% block first_title %}{{ tournament.display_name }}{% endblock %}
-{% block second_title %}Classement{% endblock %}
+{% block first_title %}{{ tournament.broadcast_event_display_name }}{% endblock %}
+{% block second_title %}Classement {{ tournament.broadcast_display_name }}{% endblock %}
 
 {% block content %}
 
diff --git a/tournaments/templates/tournaments/broadcast/broadcasted_summons.html b/tournaments/templates/tournaments/broadcast/broadcasted_summons.html
index a2a4007..08157a9 100644
--- a/tournaments/templates/tournaments/broadcast/broadcasted_summons.html
+++ b/tournaments/templates/tournaments/broadcast/broadcasted_summons.html
@@ -1,8 +1,8 @@
 {% extends 'tournaments/broadcast/broadcast_base.html' %}
 
 {% block head_title %}Convocations{% endblock %}
-{% block first_title %}{{ tournament.display_name }}{% endblock %}
-{% block second_title %}Convocations{% endblock %}
+{% block first_title %}{{ tournament.broadcast_event_display_name }}{% endblock %}
+{% block second_title %}Convocations {{ tournament.broadcast_display_name }}{% endblock %}
 
 {% block content %}
 
diff --git a/tournaments/utils/cryptography.py b/tournaments/utils/cryptography.py
deleted file mode 100644
index 172c481..0000000
--- a/tournaments/utils/cryptography.py
+++ /dev/null
@@ -1,20 +0,0 @@
-from Crypto.Cipher import AES
-import base64
-
-def decrypt_aes_gcm(encrypted_base64, key_base64):
-    # Decode the base64 encoded data and key
-    encrypted_data = base64.b64decode(encrypted_base64)
-    key = base64.b64decode(key_base64)
-
-    # Extract the nonce, tag, and ciphertext from the combined encrypted data
-    nonce = encrypted_data[:12]        # AES GCM nonce is 12 bytes
-    tag = encrypted_data[-16:]         # AES GCM tag is 16 bytes
-    ciphertext = encrypted_data[12:-16] # Ciphertext is everything in between
-
-    # Create the cipher object and decrypt the data
-    cipher = AES.new(key, AES.MODE_GCM, nonce=nonce)
-    decrypted_data = cipher.decrypt_and_verify(ciphertext, tag)
-
-    # Convert decrypted bytes to string (assuming UTF-8 encoding)
-    decrypted_text = decrypted_data.decode('utf-8')
-    return decrypted_text