diff --git a/src/serial_bridge_index.cpp b/src/serial_bridge_index.cpp
index ef7eda6..156569f 100644
--- a/src/serial_bridge_index.cpp
+++ b/src/serial_bridge_index.cpp
@@ -780,4 +780,28 @@ string serial_bridge::derivation_to_scalar(const string &args_string)
 	//
 	return ret_json_from_root(root);
 }
-
+string serial_bridge::encrypt_payment_id(const string &args_string) 
+{
+	boost::property_tree::ptree json_root;
+	if (!parsed_json_root(args_string, json_root)) {
+		// it will already have thrown an exception
+		return error_ret_json_from_message("Invalid JSON");
+	}
+	crypto::hash8 payment_id;
+	if (!epee::string_tools::hex_to_pod(json_root.get<string>("payment_id"), payment_id)) {
+		return error_ret_json_from_message("Invalid 'payment_id'");
+	}
+	crypto::public_key public_key;
+	if (!epee::string_tools::hex_to_pod(json_root.get<string>("public_key"), public_key)) {
+		return error_ret_json_from_message("Invalid 'public_key'");
+	}
+	crypto::secret_key secret_key;
+	if (!epee::string_tools::hex_to_pod(json_root.get<string>("secret_key"), secret_key)) {
+		return error_ret_json_from_message("Invalid 'secret_key'");
+	}
+	hw::device &hwdev = hw::get_device("default");
+	hwdev.encrypt_payment_id(payment_id, public_key, secret_key);
+	boost::property_tree::ptree root;
+	root.put(ret_json_key__generic_retVal(), epee::string_tools::pod_to_hex(payment_id));
+	return ret_json_from_root(root);
+}
diff --git a/src/serial_bridge_index.hpp b/src/serial_bridge_index.hpp
index 9262752..51c36eb 100644
--- a/src/serial_bridge_index.hpp
+++ b/src/serial_bridge_index.hpp
@@ -72,6 +72,7 @@ namespace serial_bridge
 	string derivation_to_scalar(const string &args_string);
 	string decodeRct(const string &args_string);
 	string decodeRctSimple(const string &args_string);
+	string encrypt_payment_id(const string &args_string);
 }
 
 #endif /* serial_bridge_index_hpp */
diff --git a/test/test_all.cpp b/test/test_all.cpp
index 4b771ed..447fb73 100644
--- a/test/test_all.cpp
+++ b/test/test_all.cpp
@@ -1247,6 +1247,31 @@ BOOST_AUTO_TEST_CASE(bridged__decodeRctSimple)
 	cout << "bridged__decodeRctSimple: amount_string: " << amount_string << endl;
 	BOOST_REQUIRE(amount_string == "10000000000");
 }
+//
+BOOST_AUTO_TEST_CASE(bridged__encrypt_payment_id)
+{
+	using namespace serial_bridge;
+	//
+	boost::property_tree::ptree root;
+	root.put("payment_id", "f0756322689f8299");
+	root.put("public_key", "9c8bd8a9ff8703ddd5e28a36dc5c5586d2ec0b4bfd9190adeea825db5808ead2");
+	root.put("secret_key", "74f277a60613a4efa33258b9814c78e0ff7a53cf8d2cd248ee921ac7f607f800");
+	//
+	auto ret_string = serial_bridge::encrypt_payment_id(args_string_from_root(root));
+	stringstream ret_stream;
+	ret_stream << ret_string;
+	boost::property_tree::ptree ret_tree;
+	boost::property_tree::read_json(ret_stream, ret_tree);
+	optional<string> err_string = ret_tree.get_optional<string>(ret_json_key__any__err_msg());
+	if (err_string != none) {
+		BOOST_REQUIRE_MESSAGE(false, *err_string);
+	}
+	optional<string> str = ret_tree.get_optional<string>(ret_json_key__generic_retVal());
+	BOOST_REQUIRE(str != none);
+	BOOST_REQUIRE((*str).size() > 0);
+	cout << "bridged__encrypt_payment_id: " << *str << endl;
+	BOOST_REQUIRE(*str == "6565253f11d43de5");
+}
 
 //
 //