How to Implement Identity based Cryptography in ns3

To implement Identity-Based Cryptography (IBC) in ns3 includes to generating a protected communication background wherever by using identities as public keys the nodes can encode and decode messages. In this procedure followed by step-by-step ideal to help you effect identity-based cryptography in ns3.

Step-by-Step Implementation:

Step 1: Set Up ns3 Environment

  1. Install ns3: Take and setup ns3. The operating system are suitable for the installation guide.
  2. Familiarize yourself with ns3: During the ns3 tutorial we read and to understand the elementary ideas and construction of ns3 simulations.

Step 2: Set Up Pairing-Based Cryptography Library

  1. Install a Pairing-Based Cryptography Library: Make sure to have the vital needs installed on your system. We can use some libraries like PBC (Pairing-Based Cryptography) or Charm. the dependencies
  2. Install the Library: For chosen library we follow the installation instructions. For occurance , for PBC:

sudo apt-get install libpbc-dev

Step 3: Define the Network Topology

  1. Create a Simple Network: By using ns3, we define a basic network topology. It includes to creating nodes, setting up channels, and constructing IP addresses. Then  We can use a point-to-point topology for simplicity.

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/point-to-point-module.h”

#include “ns3/applications-module.h”

#include <pbc/pbc.h>

#include <pbc/pbc_test.h>

#include <iostream>

#include <fstream>

using namespace ns3;

class IdentityBasedCryptography {

public:

IdentityBasedCryptography() {

// Initialize pairing

pbc_param_t param;

pairing_init_pbc_param(param, “type a”);

pairing_init_pbc_param(p, param);

}

void Setup() {

element_init_G1(P, p);

element_init_G1(Q, p);

element_init_Zr(secretKey, p);

 

element_random(P);

element_random(secretKey);

element_pow_zn(Q, P, secretKey);

}

std::string ExtractPrivateKey(const std::string &identity) {

element_t idElement;

element_init_G1(idElement, p);

element_from_hash(idElement, identity.c_str(), identity.size());

element_t privateKey;

element_init_G1(privateKey, p);

element_pow_zn(privateKey, idElement, secretKey);

std::stringstream ss;

ss << privateKey;

return ss.str();

}

std::string Encrypt(const std::string &message, const std::string &identity) {

element_t idElement;

element_init_G1(idElement, p);

element_from_hash(idElement, identity.c_str(), identity.size());

element_t sessionKey;

element_init_G1(sessionKey, p);

element_pow_zn(sessionKey, P, secretKey);

std::stringstream ss;

ss << sessionKey;

// Simple XOR encryption for demonstration

std::string encryptedMessage;

for (size_t i = 0; i < message.size(); ++i) {

encryptedMessage += message[i] ^ ss.str()[i % ss.str().size()];

}

return encryptedMessage;

}

std::string Decrypt(const std::string &encryptedMessage, const std::string &privateKey) {

element_t sessionKey;

element_init_G1(sessionKey, p);

std::stringstream ss(privateKey);

ss >> sessionKey;

std::stringstream ssKey;

ssKey << sessionKey;

// Simple XOR decryption for demonstration

std::string decryptedMessage;

for (size_t i = 0; i < encryptedMessage.size(); ++i) {

decryptedMessage += encryptedMessage[i] ^ ssKey.str()[i % ssKey.str().size()];

}

return decryptedMessage;

}

private:

pairing_t p;

element_t P, Q, secretKey;

};

class IBCApp : public Application {

public:

IBCApp() {}

virtual ~IBCApp() {}

 

void Setup(Address address, uint16_t port, IdentityBasedCryptography &ibc, const std::string &identity) {

m_peerAddress = address;

m_peerPort = port;

m_ibc = &ibc;

m_identity = identity;

m_privateKey = ibc.ExtractPrivateKey(identity);

}

private:

virtual void StartApplication() {

m_socket = Socket::CreateSocket(GetNode(), TypeId::LookupByName(“ns3::UdpSocketFactory”));

m_socket->Bind();

m_socket->Connect(InetSocketAddress(m_peerAddress, m_peerPort));

// Schedule the first packet transmission

Simulator::Schedule(Seconds(1.0), &IBCApp::SendPacket, this);

// Set up the receive callback

m_socket->SetRecvCallback(MakeCallback(&IBCApp::ReceivePacket, this));

}

virtual void StopApplication() {

if (m_socket) {

m_socket->Close();

m_socket = 0;

}

}

void SendPacket() {

std::string message = “Hello, this is a secure message!”;

std::string encryptedMessage = m_ibc->Encrypt(message, m_identity);

Ptr<Packet> packet = Create<Packet>((uint8_t*)encryptedMessage.c_str(), encryptedMessage.size());

m_socket->Send(packet);

// Schedule the next packet transmission

Simulator::Schedule(Seconds(1.0), &IBCApp::SendPacket, this);

}

void ReceivePacket(Ptr<Socket> socket) {

Ptr<Packet> packet = socket->Recv();

uint8_t buffer[1024];

packet->CopyData(buffer, packet->GetSize());

std::string encryptedMessage((char*)buffer, packet->GetSize());

std::string decryptedMessage = m_ibc->Decrypt(encryptedMessage, m_privateKey);

std::cout << “Received message: ” << decryptedMessage << std::endl;

}

Ptr<Socket> m_socket;

Address m_peerAddress;

uint16_t m_peerPort;

IdentityBasedCryptography *m_ibc;

std::string m_identity;

std::string m_privateKey;

};

int main(int argc, char *argv[]) {

NodeContainer nodes;

nodes.Create(2); // Example: 2 nodes (1 client, 1 server)

PointToPointHelper pointToPoint;

pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“1Gbps”));

pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));

NetDeviceContainer devices;

devices = pointToPoint.Install(nodes);

InternetStackHelper stack;

stack.Install(nodes);

Ipv4AddressHelper address;

address.SetBase(“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces = address.Assign(devices);

uint16_t port = 9;

// Set up Identity-Based Cryptography

IdentityBasedCryptography ibc;

ibc.Setup();

Ptr<IBCApp> clientApp = CreateObject<IBCApp>();

clientApp->Setup(InetSocketAddress(interfaces.GetAddress(1), port), port, ibc, “client@network”);

nodes.Get(0)->AddApplication(clientApp);

clientApp->SetStartTime(Seconds(2.0));

clientApp->SetStopTime(Seconds(10.0));

Ptr<IBCApp> serverApp = CreateObject<IBCApp>();

serverApp->Setup(InetSocketAddress(Ipv4Address::GetAny(), port), port, ibc, “server@network”);

nodes.Get(1)->AddApplication(serverApp);

serverApp->SetStartTime(Seconds(1.0));

serverApp->SetStopTime(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

return 0;

}

Explanation:

  1. Pairing-Based Cryptography Library Integration:
    • In identity-based cryptography by using the PBC (Pairing-Based Cryptography) library. Make sure installed and linked correctly the library.
  2. IdentityBasedCryptography Class:
    • Deal in the setup, encryption, decryption processes and private key removal.
    • Initialized Setup method for pairing and generates public parameters.
    • ExtractPrivateKey method comes a private key from the identity.
    • For encryption and decryption by using the Encrypt and Decrypt methods to derived keys.
  3. IBCApp Class:
    • To handles the application logic, including sending and getting encrypted messages.
    • Modifies Setup method for the application with peer address,, identity-based cryptography instance, port and identity.
    • StartApplication technique sets up the socket connection, lists the first packet transmission, and sets up the obtain callback.
    • SendPacket way codes a message and sends it to the peer node.
    • Decrypts the getting messages and prints it by using ReceivePacket method.
  4. Main Function:
    • Through 2 nodes (client and server) we generates a simple point-to-point network.
    • On client and server nodes we sets the IBC applications to sets up identity-based cryptography
    • The client sends encrypted messages to the server, and the server decrypts and prints the messages.

Compile and Run:

  1. Compile the Code: Make sure we have the PBC library installed on the system. Next by using the following command to  compile the code:

g++ -std=c++11 -o ns3-ibc main.cc -lpbc `pkg-config –cflags –libs ns3-dev`

  1. Run the Simulation: Implement the compiled program:

./ns3-ibc

The above setup reveals a simple implementation of identity-based cryptography in ns3. We can develop it and further we contain more nodes, complex topologies, and supplementary cryptographic functionalities as necessary.

We see the above information, attention to implement the identity and how to make a enactment file by using Identity based cryptography using ns3 device. We are excited to offer the more details about the Identity based Cryptography.

We have successfully implemented Identity-based Cryptography in the ns3 tool, and we are here to guide you on how to utilize this tool for your projects on trending topics.