diff --git a/src/security/nlsr_km.cpp b/src/security/nlsr_km.cpp
new file mode 100644
index 0000000..69052eb
--- /dev/null
+++ b/src/security/nlsr_km.cpp
@@ -0,0 +1,84 @@
+#include <ndn-cpp-dev/security/identity-certificate.hpp>
+#include <ndn-cpp-dev/encoding/block.hpp>
+#include "nlsr_sm.hpp"
+#include "nlsr_km.hpp"
+
+namespace nlsr
+{
+    void
+    KeyManager::initKeyManager(ConfParameter &cp)
+    {
+        string processIdentityName(cp.getRootKeyPrefix());
+        processIdentityName += "/";
+        processIdentityName += cp.getSiteName();
+        processIdentityName += "/";
+        processIdentityName += "R.Start";
+        processIdentityName += "/";
+        processIdentityName += cp.getRouterName();
+        processIdentityName += "/";
+        processIdentityName += "nlsr";
+        cout<<"Proces Identity Name: "<<processIdentityName<<endl;
+        ndn::Name identityName(processIdentityName);
+        routerIdentity=identityName;
+        ndn::KeyChain::deleteIdentity(routerIdentity);
+        routerCertName = ndn::KeyChain::createIdentity(routerIdentity);
+        cout<<"Certificate Name: "<<routerCertName.toUri()<<endl;
+        routerKeyName=
+            ndn::IdentityCertificate::certificateNameToPublicKeyName(routerCertName);
+        cout<<"Key Name: "<<routerKeyName.toUri()<<endl;
+        initCertSeqFromFile(cp.getSeqFileDir());
+    }
+
+    ndn::Name
+    KeyManager::getRouterCertName()
+    {
+        return routerCertName;
+    }
+
+    uint32_t
+    KeyManager::getCertSeqNo()
+    {
+        return certSeqNo;
+    }
+
+    void
+    KeyManager::setCerSeqNo(uint32_t csn)
+    {
+        certSeqNo=csn;
+    }
+
+    void
+    KeyManager::initCertSeqFromFile(string certSeqFileDir)
+    {
+        certSeqFileNameWithPath=certSeqFileDir;
+        if( certSeqFileNameWithPath.empty() )
+        {
+            SequencingManager sm;
+            certSeqFileNameWithPath=sm.getUserHomeDirectory();
+        }
+        certSeqFileNameWithPath += "/nlsrCertSeqNo.txt";
+        cout<<"Key Seq File Name: "<< certSeqFileNameWithPath<<endl;
+        std::ifstream inputFile(certSeqFileNameWithPath.c_str(),ios::binary);
+        if ( inputFile.good() )
+        {
+            inputFile>>certSeqNo;
+            certSeqNo++;
+        }
+        else
+        {
+            certSeqNo=1;
+        }
+        writeCertSeqToFile();
+    }
+
+    void
+    KeyManager::writeCertSeqToFile()
+    {
+        std::ofstream outputFile(certSeqFileNameWithPath.c_str(),ios::binary);
+        outputFile<<certSeqNo;
+        outputFile.close();
+    }
+}
+
+
+