TLV encoding to replace JSON format message
diff --git a/src/client-config.cpp b/src/client-config.cpp
index 9273760..47115bb 100644
--- a/src/client-config.cpp
+++ b/src/client-config.cpp
@@ -84,21 +84,17 @@
 }
 
 ClientCaItem
-ClientConfig::extractCaItem(const Block& contentBlock)
+ClientConfig::extractCaItem(const JsonSection& configSection)
 {
   ClientCaItem item;
-  item.m_caName = Name(readString(contentBlock.get(CAPrefix)));
+  item.m_caName = Name(configSection.get("ca-prefix", ""));
   if (item.m_caName.empty()) {
     BOOST_THROW_EXCEPTION(Error("Cannot read ca-prefix from the config file"));
   }
-  item.m_caInfo = readString(contentBlock.get(CAInfo));
-  // item.m_probe = configSection.get("probe", "");
-
-  security::v2::Certificate anchor = contentBlock.get(CACertificate);
-
-  //std::istringstream ss(configSection.get("certificate", ""));
-  //auto anchor = io::load<security::v2::Certificate>(ss);
-
+  item.m_caInfo = configSection.get("ca-info", "");
+  item.m_probe = configSection.get("probe", "");
+  std::istringstream ss(configSection.get("certificate", ""));
+  auto anchor = io::load<security::v2::Certificate>(ss);
   if (anchor == nullptr) {
     BOOST_THROW_EXCEPTION(Error("Cannot load the certificate from config file"));
   }
@@ -106,6 +102,28 @@
   return item;
 }
 
+ClientCaItem
+ClientConfig::extractCaItem(const Block& contentBlock)
+{
+  ClientCaItem item;
+  item.m_caName = Name(readString(contentBlock.get(tlv_ca_prefix)));
+  if (item.m_caName.empty()) {
+    BOOST_THROW_EXCEPTION(Error("Cannot read ca-prefix from the config file"));
+  }
+  item.m_caInfo = readString(contentBlock.get(tlv_ca_info));
+  // item.m_probe = configSection.get("probe", "");
+
+  if (!contentBlock.get(tlv_ca_certificate).hasValue()) {
+    BOOST_THROW_EXCEPTION(Error("Cannot load the certificate from config file"));
+  }
+
+  security::v2::Certificate anchor;
+  anchor.wireDecode(contentBlock.get(tlv_ca_certificate));
+  item.m_anchor = anchor;
+
+  return item;
+}
+
 void
 ClientConfig::removeCaItem(const Name& caName)
 {