diff --git a/common/src/test/java/org/opensearch/ml/common/transport/connector/MLCreateConnectorResponseTest.java b/common/src/test/java/org/opensearch/ml/common/transport/connector/MLCreateConnectorResponseTest.java
index 4a829d16f7..b24119a6c7 100644
--- a/common/src/test/java/org/opensearch/ml/common/transport/connector/MLCreateConnectorResponseTest.java
+++ b/common/src/test/java/org/opensearch/ml/common/transport/connector/MLCreateConnectorResponseTest.java
@@ -11,9 +11,13 @@
 import org.opensearch.common.xcontent.XContentType;
 import org.opensearch.core.xcontent.ToXContent;
 import org.opensearch.core.xcontent.XContentBuilder;
+import org.opensearch.ml.common.AccessMode;
 import org.opensearch.ml.common.TestHelper;
 
 import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
 
 public class MLCreateConnectorResponseTest {
 
@@ -35,4 +39,23 @@ public void readFromStream() throws IOException {
         MLCreateConnectorResponse response2 = new MLCreateConnectorResponse(output.bytes().streamInput());
         Assert.assertEquals("test_id", response2.getConnectorId());
     }
+
+    @Test
+    public void t() throws IOException {
+        MLCreateConnectorInput input = MLCreateConnectorInput.builder()
+                .name("test_connector_name")
+                .description("this is a test connector")
+                .version("1")
+                .protocol("http")
+                .parameters(Map.of("input", "test input value"))
+                .credential(Map.of("key", "test_key_value"))
+                .access(AccessMode.PUBLIC)
+                .addAllBackendRoles(true)
+                .backendRoles(Arrays.asList("r1"))
+                .build();
+        BytesStreamOutput output = new BytesStreamOutput();
+        input.writeTo(output);
+        MLCreateConnectorInput input2 = new MLCreateConnectorInput(output.bytes().streamInput());
+        Assert.assertNotNull(input2);
+    }
 }
diff --git a/ml-algorithms/build.gradle b/ml-algorithms/build.gradle
index 7b66b4e00e..8c6a9ca0db 100644
--- a/ml-algorithms/build.gradle
+++ b/ml-algorithms/build.gradle
@@ -64,7 +64,6 @@ dependencies {
     implementation 'com.amazonaws:aws-encryption-sdk-java:2.4.0'
     implementation 'com.jayway.jsonpath:json-path:2.8.0'
     implementation group: 'org.json', name: 'json', version: '20230227'
-    implementation group: 'org.yaml', name: 'snakeyaml', version: '2.0'
 }
 
 configurations.all {
diff --git a/ml-algorithms/src/main/java/org/opensearch/ml/engine/MLEngine.java b/ml-algorithms/src/main/java/org/opensearch/ml/engine/MLEngine.java
index 41f6d794c9..a273a6bead 100644
--- a/ml-algorithms/src/main/java/org/opensearch/ml/engine/MLEngine.java
+++ b/ml-algorithms/src/main/java/org/opensearch/ml/engine/MLEngine.java
@@ -5,9 +5,6 @@
 
 package org.opensearch.ml.engine;
 
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
-import com.google.gson.stream.JsonReader;
 import lombok.Getter;
 import lombok.extern.log4j.Log4j2;
 import org.opensearch.ml.common.FunctionName;
@@ -15,7 +12,6 @@
 import org.opensearch.ml.common.dataframe.DataFrame;
 import org.opensearch.ml.common.dataset.DataFrameInputDataset;
 import org.opensearch.ml.common.dataset.MLInputDataset;
-import org.opensearch.ml.common.exception.MLException;
 import org.opensearch.ml.common.input.Input;
 import org.opensearch.ml.common.input.parameter.MLAlgoParams;
 import org.opensearch.ml.common.input.MLInput;
@@ -23,25 +19,10 @@
 import org.opensearch.ml.common.output.MLOutput;
 import org.opensearch.ml.common.output.Output;
 import org.opensearch.ml.engine.encryptor.Encryptor;
-import org.opensearch.ml.engine.encryptor.EncryptorImpl;
-import org.yaml.snakeyaml.DumperOptions;
-import org.yaml.snakeyaml.Yaml;
-
-import java.io.FileInputStream;
-import java.io.FileReader;
-import java.io.FileWriter;
-import java.nio.file.Files;
 import java.nio.file.Path;
-import java.security.AccessController;
-import java.security.PrivilegedExceptionAction;
-import java.security.SecureRandom;
-import java.util.Base64;
-import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
 
-import static org.opensearch.ml.common.CommonValue.MASTER_KEY;
-
 /**
  * This is the interface to all ml algorithms.
  */
@@ -68,33 +49,6 @@ public MLEngine(Path opensearchDataFolder, Path opensearchConfigFolder, Encrypto
         this.mlUserConfigPath = opensearchConfigFolder.resolve("opensearch-ml");
         this.mlConfigPath = mlCachePath.resolve("config");
         this.encryptor = encryptor;
-        initMasterKey();
-    }
-
-    private synchronized void initMasterKey() {
-        try {
-            AccessController.doPrivileged((PrivilegedExceptionAction<Void>) () -> {
-                Path userConfigFilePath = mlUserConfigPath.resolve("security_config.json");
-                Map<String, String> config = null;
-                if (Files.exists(userConfigFilePath)) {
-                    try (FileInputStream fis = new FileInputStream(userConfigFilePath.toFile());) {
-                        Yaml yaml = new Yaml();
-                        config = yaml.load(fis);
-                    }
-                }
-                if (config == null) {
-                    config = new HashMap<>();
-                }
-
-                if (config.containsKey(MASTER_KEY)) {
-                    encryptor.setMasterKey(config.get(MASTER_KEY));
-                }
-                return null;
-            });
-        } catch (Exception e) {
-            log.error("Failed to save master key", e);
-            throw new MLException(e);
-        }
     }
 
     public String getPrebuiltModelMetaListPath() {