diff --git a/src/Controller/ServerUsersController.php b/src/Controller/ServerUsersController.php
index 238090123..4a04fe9b4 100644
--- a/src/Controller/ServerUsersController.php
+++ b/src/Controller/ServerUsersController.php
@@ -15,7 +15,7 @@ class ServerUsersController extends AppController
     public function initialize()
     {
         parent::initialize();
-        //$this->Auth->allow(['add', 'edit']);
+        $this->Auth->allow(['add', 'edit']);
         $this->Auth->deny('index');
     }
     
diff --git a/src/Controller/StateUsersController.php b/src/Controller/StateUsersController.php
index ad86e651a..87da4e5cb 100644
--- a/src/Controller/StateUsersController.php
+++ b/src/Controller/StateUsersController.php
@@ -3,6 +3,8 @@ namespace App\Controller;
 
 use App\Controller\AppController;
 
+use Model\Transactions\TransactionCreation;
+
 /**
  * StateUsers Controller
  *
@@ -26,6 +28,15 @@ class StateUsersController extends AppController
 
         $this->set(compact('stateUsers'));
     }
+    
+    public function listIdentHashes()
+    {
+        $stateUsers = $this->StateUsers->find('all')->toArray();
+        foreach($stateUsers as $i => $user) {
+          $stateUsers[$i]->identHash = TransactionCreation::DRMakeStringHash($user->email);
+        }
+        $this->set('stateUsers', $stateUsers);
+    }
 
     /**
      * View method
diff --git a/src/Controller/TransactionCreationsController.php b/src/Controller/TransactionCreationsController.php
index a4c9434b0..a79550170 100644
--- a/src/Controller/TransactionCreationsController.php
+++ b/src/Controller/TransactionCreationsController.php
@@ -11,10 +11,9 @@ use Cake\Datasource\ConnectionManager;
 
 use App\Form\CreationForm;
 // protobuf transactions
-use Model\Messages\Gradido\TransactionCreation;
-use Model\Messages\Gradido\TransactionBody;
-use Model\Messages\Gradido\ReceiverAmount;
-use Model\Messages\Gradido\TimestampSeconds;
+//use Model\Messages\Gradido\TransactionCreation;
+use Model\Transactions\TransactionCreation;
+
 /**
  * TransactionCreations Controller
  *
@@ -92,7 +91,7 @@ class TransactionCreationsController extends AppController
           if($name === NULL) {
             $name = $stateUser->first_name . ' ' . $stateUser->last_name;
           }
-          array_push($receiverProposal, ['name' => $name, 'key' => $keyHex]);
+          array_push($receiverProposal, ['name' => $name, 'key' => $keyHex, 'email' => $stateUser->email]);
           //$stateUser->public_key
         }
         $timeUsed = microtime(true) - $startTime;
@@ -103,42 +102,23 @@ class TransactionCreationsController extends AppController
           $mode = 'next';
           if(isset($requestData['add'])) {$mode = 'add'; }
           if($creationForm->validate($requestData)) {
-          
+            
             $pubKeyHex = '';
-            $receiver = new ReceiverAmount();
+            $identHash = '';
+            $amountCent = $this->GradidoNumber->parseInputNumberToCentNumber($requestData['amount']);
+            $receiverIndex = intval($requestData['receiver'])-1;
 
-            $receiver->setAmount($this->GradidoNumber->parseInputNumberToCentNumber($requestData['amount']));
-
-            if(intval($requestData['receiver']) == 0) {
-              if(strlen($requestData['receiver_pubkey_hex']) != 64) {
-                $this->Flash->error(__('Invalid public Key, must contain 64 Character'));
-              } else {
-                $pubKeyHex = $requestData['receiver_pubkey_hex'];
-              }
-            } else {
-              $receiverIndex = intval($requestData['receiver'])-1;
-              
-              if(count($receiverProposal) > $receiverIndex) {
-                $pubKeyHex = $receiverProposal[$receiverIndex]['key'];
-              }
+            if(count($receiverProposal) > $receiverIndex) {
+              $pubKeyHex = $receiverProposal[$receiverIndex]['key'];
+              $identHash = TransactionCreation::DRMakeStringHash($receiverProposal[$receiverIndex]['email']);
             }
-            if($pubKeyHex != '') {
-              $pubKeyBin = hex2bin($pubKeyHex);
-
-              $receiver->setEd25519ReceiverPubkey($pubKeyBin);
-              //var_dump($requestData);
-              
-              $creationDate = new TimestampSeconds();
-              $creationDate->setSeconds(time());
-              
-              $transactionBody = new TransactionBody();
-              $transactionBody->setMemo($requestData['memo']);
-              $transactionBody->setCreated($creationDate);
-              
-              $transaction = new TransactionCreation();
-              $transaction->setReceiverAmount($receiver);
-              $transaction->setIdentHash($user['ident_hash']);
-              $transactionBody->setCreation($transaction);
+            $builderResult = TransactionCreation::build(
+                    $amountCent, 
+                    $requestData['memo'], 
+                    $pubKeyHex,
+                    $identHash
+            );
+            if($builderResult['state'] == 'success') {
               
               $http = new Client();
               try {
@@ -147,7 +127,7 @@ class TransactionCreationsController extends AppController
                 $session_id = $session->read('session_id');
                 $response = $http->get($url . '/checkTransaction', [
                     'session_id' => $session_id,
-                    'transaction_base64' => base64_encode($transactionBody->serializeToString())
+                    'transaction_base64' => base64_encode($builderResult['transactionBody']->serializeToString())
                 ]);
                 $json = $response->getJson();
                 if($json['state'] != 'success') {
@@ -262,7 +242,23 @@ class TransactionCreationsController extends AppController
         
         if ($this->request->is('post')) {
           $requestData = $this->request->getData();
-          var_dump($requestData);
+          // memo
+          // amount
+          $memo = $requestData['memo'];
+          $amountCent = $this->GradidoNumber->parseInputNumberToCentNumber($requestData['amount']);
+          if(!isset($requestData['user']) || count($requestData['user']) == 0) {
+            $this->Flash->error(__('no user choosen'));
+          } else {
+            $users = $requestData['user'];
+            var_dump($users);
+            $receiverUsers = $stateUserTable
+                    ->find('all')
+                    ->where(['id' => array_keys($users)])
+                    ->select(['public_key', 'email']);
+            //$identHash = TransactionCreation::DRMakeStringHash($receiverProposal[$receiverIndex]['email']);
+            
+          }
+          
         }
         
         
diff --git a/src/Model/Table/TransactionCreationsTable.php b/src/Model/Table/TransactionCreationsTable.php
index 70ab54071..bc9592ccf 100644
--- a/src/Model/Table/TransactionCreationsTable.php
+++ b/src/Model/Table/TransactionCreationsTable.php
@@ -45,10 +45,6 @@ class TransactionCreationsTable extends Table
             'foreignKey' => 'state_user_id',
             'joinType' => 'INNER'
         ]);
-        $this->belongsTo('StateUsers', [
-            'foreignKey' => 'receiver_user_id',
-            'joinType' => 'INNER'
-        ]);
     }
 
     /**
diff --git a/src/Model/Transactions/TransactionBase.php b/src/Model/Transactions/TransactionBase.php
index 50eb72738..81060dbfe 100644
--- a/src/Model/Transactions/TransactionBase.php
+++ b/src/Model/Transactions/TransactionBase.php
@@ -1,69 +1,69 @@
-<?php
-
-namespace Model\Transactions;
-
-use Cake\ORM\TableRegistry;
-
-class TransactionBase {
-    private $errors = [];
-  
-    public function getErrors() {
-      return $this->errors;
-    }
-
-    public function addError($functionName, $errorName) {
-      array_push($this->errors, [$functionName => $errorName]);
-    }
-    
-    public function addErrors($errors) {
-      $this->errors = array_merge($this->errors, $errors);
-    }
-  
-    public function hasErrors() {
-       return count($this->errors) > 0;
-    }
-    
-    protected function getStateUserId($publicKey) {
-      $stateUsersTable = TableRegistry::getTableLocator()->get('state_users');
-      $stateUser = $stateUsersTable->find('all')->select(['id'])->where(['public_key' => $publicKey])->first();
-      if($stateUser) {
-        return $stateUser->id;
-      }
-      // create new entry
-      $stateUserEntity = $stateUsersTable->newEntity();
-      $stateUserEntity->public_key = $publicKey;
-      if($stateUsersTable->save($stateUserEntity)) {
-        return $stateUserEntity->id;
-      } else {
-        $this->addError('TransactionBase::getStateUserId', 'error saving new state user with error: ' . json_encode($stateUserEntity->getErrors()));
-      }
-      
-      return NULL;
-    }
-    
-    protected function updateStateBalance($stateUserId, $newAmountCent) {
-        $stateBalancesTable = TableRegistry::getTableLocator()->get('stateBalances');
-        $stateBalanceQuery = $stateBalancesTable
-                ->find('all')
-                ->select(['amount'])
-                ->contain(false)
-                ->where(['state_user_id' => $stateUserId]);//->first();
-        //debug($stateBalanceQuery);
-        
-        if($stateBalanceQuery->count() > 0) {
-          $stateBalanceEntry = $stateBalanceQuery->first();
-          $stateBalanceEntry->amount += $newAmountCent;
-        } else {
-          $stateBalanceEntry = $stateBalancesTable->newEntity();
-          $stateBalanceEntry->state_user_id = $stateUserId;
-          $stateBalanceEntry->amount = $newAmountCent;
-        }
-        
-        if(!$stateBalancesTable->save($stateBalanceEntry)) {
-          $errors = $stateBalanceEntry->getErrors();
-          $this->addError('TransactionBase::updateStateBalance', 'error saving state balance with: ' . json_encode($errors));
-          return false;
-        }
-        return true;
-    }
+<?php
+
+namespace Model\Transactions;
+
+use Cake\ORM\TableRegistry;
+
+class TransactionBase {
+    private $errors = [];
+  
+    public function getErrors() {
+      return $this->errors;
+    }
+
+    public function addError($functionName, $errorName) {
+      array_push($this->errors, [$functionName => $errorName]);
+    }
+    
+    public function addErrors($errors) {
+      $this->errors = array_merge($this->errors, $errors);
+    }
+  
+    public function hasErrors() {
+       return count($this->errors) > 0;
+    }
+    
+    protected function getStateUserId($publicKey) {
+      $stateUsersTable = TableRegistry::getTableLocator()->get('state_users');
+      $stateUser = $stateUsersTable->find('all')->select(['id'])->where(['public_key' => $publicKey])->first();
+      if($stateUser) {
+        return $stateUser->id;
+      }
+      // create new entry
+      $stateUserEntity = $stateUsersTable->newEntity();
+      $stateUserEntity->public_key = $publicKey;
+      if($stateUsersTable->save($stateUserEntity)) {
+        return $stateUserEntity->id;
+      } else {
+        $this->addError('TransactionBase::getStateUserId', 'error saving new state user with error: ' . json_encode($stateUserEntity->getErrors()));
+      }
+      
+      return NULL;
+    }
+    
+    protected function updateStateBalance($stateUserId, $newAmountCent) {
+        $stateBalancesTable = TableRegistry::getTableLocator()->get('stateBalances');
+        $stateBalanceQuery = $stateBalancesTable
+                ->find('all')
+                ->select(['amount', 'id'])
+                ->contain(false)
+                ->where(['state_user_id' => $stateUserId]);//->first();
+        //debug($stateBalanceQuery);
+        
+        if($stateBalanceQuery->count() > 0) {
+          $stateBalanceEntry = $stateBalanceQuery->first();
+          $stateBalanceEntry->amount += $newAmountCent;
+        } else {
+          $stateBalanceEntry = $stateBalancesTable->newEntity();
+          $stateBalanceEntry->state_user_id = $stateUserId;
+          $stateBalanceEntry->amount = $newAmountCent;
+        }
+        //echo "\ntry to save: "; var_dump($stateBalanceEntry); echo "\n";
+        if(!$stateBalancesTable->save($stateBalanceEntry)) {
+          $errors = $stateBalanceEntry->getErrors();
+          $this->addError('TransactionBase::updateStateBalance', 'error saving state balance with: ' . json_encode($errors));
+          return false;
+        }
+        return true;
+    }
 }
\ No newline at end of file
diff --git a/src/Model/Transactions/TransactionCreation.php b/src/Model/Transactions/TransactionCreation.php
index 073ae2bf7..d495556fb 100644
--- a/src/Model/Transactions/TransactionCreation.php
+++ b/src/Model/Transactions/TransactionCreation.php
@@ -10,10 +10,57 @@ class TransactionCreation extends TransactionBase {
   
     private $protoTransactionCreation;
     private $transactionCreationsTable;
+    private $receiver_pubkey_hex;
     
     public function __construct($protoTransactionCreation) {
       $this->protoTransactionCreation = $protoTransactionCreation;
       $this->transactionCreationsTable = TableRegistry::getTableLocator()->get('transaction_creations');
+      $this->receiver_pubkey_hex = bin2hex($this->getReceiverPublic());
+    }
+    
+    static public function build($amount, $memo, $receiver_public_hex, $ident_hash) 
+    {    
+        $receiver = new \Model\Messages\Gradido\ReceiverAmount();
+        $receiver->setAmount($amount);
+        $this->receiver_pubkey_hex = $receiver_public_hex;
+        if(strlen($receiver_public_hex) != 64) {
+          return ['state' => 'error', 'msg' => 'invalid pubkey'];
+        }
+        $pubKeyBin = hex2bin($receiver_public_hex);
+        $receiver->setEd25519ReceiverPubkey($pubKeyBin);
+        //var_dump($requestData);
+
+        $creationDate = new \Model\Messages\Gradido\TimestampSeconds();
+        $creationDate->setSeconds(time());
+
+        $transactionBody = new \Model\Messages\Gradido\TransactionBody();
+        $transactionBody->setMemo($memo);
+        $transactionBody->setCreated($creationDate);
+
+        $transaction = new \Model\Messages\Gradido\TransactionCreation();
+        $transaction->setReceiverAmount($receiver);
+        $transaction->setIdentHash($ident_hash);
+        $transactionBody->setCreation($transaction);
+        return ['state' => 'success', 'transactionBody' => $transactionBody];
+    }
+    
+    static protected function DRHashRotateLeft( $hash, $rotateBy )
+    {
+      return ($hash<<$rotateBy)|($hash>>(32-$rotateBy));
+    }
+
+    static public function DRMakeStringHash($str) 
+    {
+      $ret = 0;
+
+      if( $str )
+      {
+        for ($i=0; $i < strlen($str); $i++)
+        {
+          $ret = TransactionCreation::DRHashRotateLeft($ret, 7) + ord($str{$i});
+        }
+      }
+      return $ret;
     }
     
     public function getAmount() {
@@ -28,6 +75,7 @@ class TransactionCreation extends TransactionBase {
       return $this->protoTransactionCreation->getIdentHash();
     }
     
+    
     public function validate($sigPairs) {
       // check if receiver public is not in signature list
       $receiverPublic = $this->getReceiverPublic();
@@ -43,25 +91,33 @@ class TransactionCreation extends TransactionBase {
       
       //$identHashBin = sprintf("%0d", $this->getIdentHash());
       // padding with zero in case hash is smaller than 32 bytes, static length binary field in db
+      // ident hash isn't collision ressistent, it is for speed up search
       $identHashBin = pack('a32', $this->getIdentHash());
       
       $existingCreations = $this->transactionCreationsTable
               ->find('all')
-              ->group('ident_hash')
+              ->select(['amount', 'state_user_id'])
+              ->contain(['StateUsers' => ['fields' => ['StateUsers.public_key']]])
               ->where(['ident_hash' => $identHashBin]);
-      $existingCreations->select(['amount_sum' => $existingCreations->func()->sum('amount')]);
+      //$existingCreations->select(['amount_sum' => $existingCreations->func()->sum('amount')]);
+      $existingCreations->select(['amount', 'state_user_id']);
       $existingCreations->matching('Transactions', function ($q) {
           return $q->where(['EXTRACT(YEAR_MONTH FROM Transactions.received) LIKE EXTRACT(YEAR_MONTH FROM NOW())']);
       });
       //debug($existingCreations);
-      if($existingCreations->count() > 0) {
-        //var_dump($existingCreations->toArray());
-        //echo "amount sum: " . $existingCreations->first()->amount_sum . "\n"; 
-        if($this->getAmount() + $existingCreations->first()->amount_sum > 10000000) {
-          $this->addError('TransactionCreation::validate', 'Creation more than 1000 gr per Month not allowed');
-          return false;
+      $newSum = $this->getAmount();
+      //var_dump($existingCreations->toArray());
+      foreach($existingCreations as $creation) {
+        $keyHex = bin2hex(stream_get_contents($creation->state_user->public_key));
+        //echo "\ncompare \n$keyHex\nwith: \n". $this->receiver_pubkey_hex."\n";
+        if($keyHex == $this->receiver_pubkey_hex) {
+          $newSum += $creation->amount;
         }
-      } 
+      }
+      if($newSum > 10000000) {
+        $this->addError('TransactionCreation::validate', 'Creation more than 1000 gr per Month not allowed');
+        return false;
+      }
       //die("\n");
       return true;
     }
diff --git a/src/Template/Element/printGradido.ctp b/src/Template/Element/printGradido.ctp
index 2f288d9be..0e4d71173 100644
--- a/src/Template/Element/printGradido.ctp
+++ b/src/Template/Element/printGradido.ctp
@@ -14,5 +14,5 @@ else if($number > 0) $class = "grd-positive-currency";*/
 
 ?>
 <span class="<?php echo $class;?>">
-  <?= $this->Number->format(intval($number) / 10000.0, ['precision' => 2]) . ' grd';?>
+  <?= $this->Number->format(intval($number) / 10000.0, ['precision' => 2]) . ' GDD';?>
 </span>
\ No newline at end of file
diff --git a/src/Template/TransactionCreations/create_multi.ctp b/src/Template/TransactionCreations/create_multi.ctp
index 407afff45..fa2547436 100644
--- a/src/Template/TransactionCreations/create_multi.ctp
+++ b/src/Template/TransactionCreations/create_multi.ctp
@@ -44,7 +44,7 @@ $this->assign('title', __('Schöpfungstransaktion'));
     <?= $this->Form->control('amount'); ?>
     <?php foreach($possibleReceiver as $possibleReceiver) : ?>
     <div class="grd_big_checkbox">
-      <?= $this->Form->checkbox('user[' .$possibleReceiver['id'] . ']',  ['hiddenField' => false]); ?>
+      <?= $this->Form->checkbox('user[' .$possibleReceiver['id'] . ']',  ['value' => $possibleReceiver['id'], 'hiddenField' => false]); ?>
       <?= $possibleReceiver['name'] ?>   
         <?php if($possibleReceiver['email'] != '') : ?>
           &lt;<?= $possibleReceiver['email'] ?>&gt;
diff --git a/src/Template/TransactionSendCoins/create.ctp b/src/Template/TransactionSendCoins/create.ctp
index d43942439..83987ee99 100644
--- a/src/Template/TransactionSendCoins/create.ctp
+++ b/src/Template/TransactionSendCoins/create.ctp
@@ -20,7 +20,7 @@ $this->assign('title', __('Überweisung'));
               <?= $this->Form->create($creationForm) ?>
                 <div class="form-group row showcase_row_area">
                   <div class="col-md-3 showcase_text_area">
-                    <label for="inputAmount">Betrag in grd</label>
+                    <label for="inputAmount">Betrag in GDD</label>
                   </div>
                   <div class="col-md-9 showcase_content_area">
                     <input type="number" step="0.01" class="form-control" id="inputAmount" name="inputAmount" >
diff --git a/tests/Fixture/StateBalancesFixture.php b/tests/Fixture/StateBalancesFixture.php
index 2e969e749..8db926511 100644
--- a/tests/Fixture/StateBalancesFixture.php
+++ b/tests/Fixture/StateBalancesFixture.php
@@ -15,7 +15,7 @@ class StateBalancesFixture extends TestFixture
      */
     // @codingStandardsIgnoreStart
     public $fields = [
-        'id' => ['type' => 'integer', 'length' => 11, 'unsigned' => false, 'null' => false, 'default' => null, 'comment' => '', 'precision' => null, 'autoIncrement' => null],
+        'id' => ['type' => 'integer', 'length' => 11, 'unsigned' => false, 'null' => false, 'default' => null, 'comment' => '', 'precision' => null, 'autoIncrement' => true],
         'state_user_id' => ['type' => 'integer', 'length' => 11, 'unsigned' => false, 'null' => false, 'default' => null, 'comment' => '', 'precision' => null, 'autoIncrement' => null],
         'modified' => ['type' => 'datetime', 'length' => null, 'null' => false, 'default' => null, 'comment' => '', 'precision' => null],
         'amount' => ['type' => 'biginteger', 'length' => 20, 'unsigned' => false, 'null' => false, 'default' => null, 'comment' => '', 'precision' => null, 'autoIncrement' => null],
diff --git a/tests/Fixture/StateUsersFixture.php b/tests/Fixture/StateUsersFixture.php
index e2baced86..28e03e3f3 100644
--- a/tests/Fixture/StateUsersFixture.php
+++ b/tests/Fixture/StateUsersFixture.php
@@ -44,8 +44,8 @@ class StateUsersFixture extends TestFixture
                 'id' => 1,
                 'index_id' => 0,
                 'group_id' => 0,
-                'public_key' => '0x94ae135b93cd9f33752b4e55c41903a3faa13a75bb90bfd411ea1d4a1a5e711f',
-                'email' => NULL,
+                'public_key' => hex2bin('94ae135b93cd9f33752b4e55c41903a3faa13a75bb90bfd411ea1d4a1a5e711f'),
+                'email' => '***REMOVED***',
                 'first_name' => 'Dario',
                 'last_name' => 'Rekowski'
             ],
@@ -53,8 +53,8 @@ class StateUsersFixture extends TestFixture
                 'id' => 11,
                 'index_id' => 0,
                 'group_id' => 0,
-                'public_key' => '0x61b923c218cb63a64a8c62f3860121283b9577f374d0a31590ba02cdc2912999',
-                'email' => NULL,
+                'public_key' => hex2bin('61b923c218cb63a64a8c62f3860121283b9577f374d0a31590ba02cdc2912999'),
+                'email' => 'em741@gmx.de',
                 'first_name' => 'Dario',
                 'last_name' => 'Rekowski'
             ],