diff --git a/src/Jobs/SamlSso.php b/src/Jobs/SamlSso.php
index 3e8715f..2c45e97 100644
--- a/src/Jobs/SamlSso.php
+++ b/src/Jobs/SamlSso.php
@@ -18,6 +18,7 @@
 use LightSaml\Credential\X509Certificate;
 use LightSaml\Model\Assertion\Conditions;
 use LightSaml\Model\Protocol\AuthnRequest;
+use RobRichards\XMLSecLibs\XMLSecurityKey;
 use Illuminate\Foundation\Bus\Dispatchable;
 use LightSaml\Model\Assertion\AuthnContext;
 use LightSaml\Model\XmlDSig\SignatureWriter;
@@ -126,7 +127,7 @@ public function response()
         // Encrypt the assertion
 
         if ($this->encryptAssertion()) {
-            $encryptedAssertion = new EncryptedAssertionWriter();
+            $encryptedAssertion = $this->getEncryptionAssertionWriter();
             $encryptedAssertion->encrypt($assertion, KeyHelper::createPublicKey(
                 $this->getSpCertificate()
             ));
@@ -228,4 +229,20 @@ private function encryptAssertion(): bool
             config('samlidp.encrypt_assertion', true)
         );
     }
+
+    private function getEncryptionAssertionWriter() {
+        $blockEncryptionAlgorithm = config(sprintf(
+            'samlidp.sp.%s.block_encryption_algorithm', $this->getServiceProvider($this->authn_request)
+        ));
+
+        $keyTransportEncryption = config(sprintf(
+            'samlidp.sp.%s.key_transport_encryption', $this->getServiceProvider($this->authn_request)
+        ));
+
+        // because PHP < 7.4 is supported in this package we can't use the null coalescing assignment operator (??=)
+        $blockEncryptionAlgorithm = $blockEncryptionAlgorithm ?? XMLSecurityKey::AES128_CBC;
+        $keyTransportEncryption = $keyTransportEncryption ?? XMLSecurityKey::RSA_1_5;
+
+        return new EncryptedAssertionWriter($blockEncryptionAlgorithm, $keyTransportEncryption);
+    }
 }