switch to new server and enable encryption

graphdb.gwdg.de.certificate

+-----BEGIN CERTIFICATE-----
+MIIIDDCCBvSgAwIBAgIMIqVn2gwKHXHTeZnWMA0GCSqGSIb3DQEBCwUAMIGNMQsw
+CQYDVQQGEwJERTFFMEMGA1UECgw8VmVyZWluIHp1ciBGb2VyZGVydW5nIGVpbmVz
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+C5tXPFPwwOQ4eHAlCBcvo6odBxPTDAAAAXE7G0qnAAAEAwBIMEYCIQCin5CAI4qE
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+zWX/+XffWRSamHXnkhObFL1t1oxHxeAU4k+BS2wYItxVoS4dDuTlvxC+eAe5o3+V
+Wc2nCowwunYJlqUTyzWZvdrzmdKQCfb2WS4yIvvvyNIrnfCtX3vrSs4qIJVflVc4
+QdjWMRam0jAwWcS041Osg89GxiZCGQuHzCHyok9kwHGRn9hYtzPLRF80emvB/4Ew
+gn7B3MkfTzk4eAFoqrJyAxsK9n3ngQY7iRYg6qpDEQT6kL30028NQS59xaBbpBlJ
+zG3DTJhwZCSjLpCPEEdqqBSY+3/h4HAk0tvg9jwVZz12LqUNBW0fIr2pLfaENSQu
+-----END CERTIFICATE-----

src/main/java/internship/Main.java

 package internship;
 
 import org.neo4j.driver.*;
+import org.neo4j.driver.Config.*;
 
 import internship.webdirget.*;
 
@@ -17,7 +18,8 @@ public class Main {
 	public static String failed_to_upload_sensors_file = "failed_to_upload.txt";
 	public static String database_name = "sensor";
 	private static String http_agent = "Please/0.5";
-	private static String neo4j_uri = "bolt://141.5.106.80:7687";
+	private static String neo4j_uri = "neo4j://graphdb.gwdg.de:7687";
+	private static File neo4j_server_certificate_file = new File("graphdb.gwdg.de.certificate");
 	private static String archive_uri = "http://archive.sensor.community/";
 
 	public static java.util.logging.Logger glogger;
@@ -33,7 +35,11 @@ public class Main {
 		driver = GraphDatabase.driver(
 			neo4j_uri,
 			token,
-			Config.builder().withLogging(Logging.console(Level.INFO)).build()
+			Config.builder()
+				.withLogging(Logging.console(Level.INFO))
+				.withEncryption()
+				.withTrustStrategy(TrustStrategy.trustCustomCertificateSignedBy(neo4j_server_certificate_file))
+			.build()
 		);
 	}