To implement cryptography in ns3 consists to create application that simulates encoding and decoding of data as it transfers over the network. Our distinguished team is responsible for carrying out the application of various cryptography principles. Here are the procedures for you to guide on how to set up a simple network with cryptographic functionalities by ns3 environment.
Step-by-Step Implementation
- Install ns3
Make sure ns3 is installed on your system. You can download and install it.
- Define the Network Topology
Describe the network topology that contains:
- Sender node
- Receiver node
- Create Network Nodes
Create network nodes using NodeContainer.
NodeContainer senderNode, receiverNode;
senderNode.Create(1);
receiverNode.Create(1);
- Set Up Network Devices
Install network devices on the nodes using appropriate network interfaces, such as WiFi for wireless communication.
WifiHelper wifi;
wifi.SetStandard(WIFI_PHY_STANDARD_80211n_5GHZ);
WifiMacHelper mac;
mac.SetType(“ns3::AdhocWifiMac”);
YansWifiPhyHelper phy = YansWifiPhyHelper::Default();
YansWifiChannelHelper channel = YansWifiChannelHelper::Default();
phy.SetChannel(channel.Create());
NetDeviceContainer senderDevice = wifi.Install(phy, mac, senderNode);
NetDeviceContainer receiverDevice = wifi.Install(phy, mac, receiverNode);
- Configure Mobility Model
Set up the mobility model for the nodes.
MobilityHelper mobility;
mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);
mobility.Install(senderNode);
mobility.Install(receiverNode);
- Implement Cryptography Application
Create an application that performs encryption and decryption. Below is an example of a simple cryptographic application.
Cryptographic Application (Example)
class CryptoApplication : public Application {
public:
void StartApplication() override {
sendSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
sendSocket->Connect(InetSocketAddress(destAddress, destPort));
recvSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
recvSocket->Bind(InetSocketAddress(Ipv4Address::GetAny(), localPort));
recvSocket->SetRecvCallback(MakeCallback(&CryptoApplication::ReceivePacket, this));
// Schedule the first packet send
SendPacket();
}
void SetRemote(Address address, uint16_t port) {
destAddress = address;
destPort = port;
}
void SetLocalPort(uint16_t port) {
localPort = port;
}
void SendPacket() {
std::string message = “Hello, this is an encrypted message”;
std::string encryptedMessage = EncryptMessage(message);
Ptr<Packet> packet = Create<Packet>((uint8_t*) encryptedMessage.c_str(), encryptedMessage.size());
sendSocket->Send(packet);
// Schedule the next packet send
Simulator::Schedule(Seconds(1.0), &CryptoApplication::SendPacket, this);
}
void ReceivePacket(Ptr<Socket> socket) {
Ptr<Packet> packet;
Address from;
while ((packet = socket->RecvFrom(from))) {
std::string encryptedMessage = std::string((char*) packet->PeekData(), packet->GetSize());
std::string message = DecryptMessage(encryptedMessage);
std::cout << “Received message: ” << message << std::endl;
}
}
std::string EncryptMessage(const std::string& message) {
// Placeholder encryption logic
std::string encrypted = message;
std::reverse(encrypted.begin(), encrypted.end()); // Simple reverse encryption for demonstration
return encrypted;
}
std::string DecryptMessage(const std::string& encryptedMessage) {
// Placeholder decryption logic
std::string decrypted = encryptedMessage;
std::reverse(decrypted.begin(), decrypted.end()); // Simple reverse decryption for demonstration
return decrypted;
}
private:
Ptr<Socket> sendSocket;
Ptr<Socket> recvSocket;
Address destAddress;
uint16_t destPort;
uint16_t localPort;
};
- Set Up Applications
Install the applications on the nodes.
ApplicationContainer senderApp, receiverApp;
// Sender application
Ptr<CryptoApplication> senderCryptoApp = CreateObject<CryptoApplication>();
senderCryptoApp->SetRemote(receiverNode.Get(0)->GetObject<Ipv4>()->GetAddress(1, 0).GetLocal(), 9);
senderCryptoApp->SetLocalPort(10);
senderNode.Get(0)->AddApplication(senderCryptoApp);
senderCryptoApp->SetStartTime(Seconds(1.0));
senderCryptoApp->SetStopTime(Seconds(20.0));
senderApp.Add(senderCryptoApp);
// Receiver application
Ptr<CryptoApplication> receiverCryptoApp = CreateObject<CryptoApplication>();
receiverCryptoApp->SetLocalPort(9);
receiverNode.Get(0)->AddApplication(receiverCryptoApp);
receiverCryptoApp->SetStartTime(Seconds(1.0));
receiverCryptoApp->SetStopTime(Seconds(20.0));
receiverApp.Add(receiverCryptoApp);
- Set Up Routing Protocols
Configure routing protocols for the network.
AodvHelper aodv;
InternetStackHelper internet;
internet.SetRoutingHelper(aodv);
internet.Install(senderNode);
internet.Install(receiverNode);
- Assign IP Addresses
Assign IP addresses to the network devices.
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer senderInterfaces = address.Assign(senderDevice);
Ipv4InterfaceContainer receiverInterfaces = address.Assign(receiverDevice);
- Run the Simulation
Configure the simulation runtime and execute it.
Simulator::Stop(Seconds(20.0));
Simulator::Run();
Simulator::Destroy();
Example of a Simple Cryptographic Network Script
The given below is the sample script for cryptographic network:
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/wifi-module.h”
#include “ns3/mobility-module.h”
#include “ns3/applications-module.h”
#include “ns3/aodv-module.h”
using namespace ns3;
class CryptoApplication : public Application {
public:
void StartApplication() override {
sendSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
sendSocket->Connect(InetSocketAddress(destAddress, destPort));
recvSocket = Socket::CreateSocket(GetNode(), UdpSocketFactory::GetTypeId());
recvSocket->Bind(InetSocketAddress(Ipv4Address::GetAny(), localPort));
recvSocket->SetRecvCallback(MakeCallback(&CryptoApplication::ReceivePacket, this));
// Schedule the first packet send
SendPacket();
}
void SetRemote(Address address, uint16_t port) {
destAddress = address;
destPort = port;
}
void SetLocalPort(uint16_t port) {
localPort = port;
}
void SendPacket() {
std::string message = “Hello, this is an encrypted message”;
std::string encryptedMessage = EncryptMessage(message);
Ptr<Packet> packet = Create<Packet>((uint8_t*) encryptedMessage.c_str(), encryptedMessage.size());
sendSocket->Send(packet);
// Schedule the next packet send
Simulator::Schedule(Seconds(1.0), &CryptoApplication::SendPacket, this);
}
void ReceivePacket(Ptr<Socket> socket) {
Ptr<Packet> packet;
Address from;
while ((packet = socket->RecvFrom(from))) {
std::string encryptedMessage = std::string((char*) packet->PeekData(), packet->GetSize());
std::string message = DecryptMessage(encryptedMessage);
std::cout << “Received message: ” << message << std::endl;
}
}
std::string EncryptMessage(const std::string& message) {
// Placeholder encryption logic
std::string encrypted = message;
std::reverse(encrypted.begin(), encrypted.end()); // Simple reverse encryption for demonstration
return encrypted;
}
std::string DecryptMessage(const std::string& encryptedMessage) {
// Placeholder decryption logic
std::string decrypted = encryptedMessage;
std::reverse(decrypted.begin(), decrypted.end()); // Simple reverse decryption for demonstration
return decrypted;
}
private:
Ptr<Socket> sendSocket;
Ptr<Socket> recvSocket;
Address destAddress;
uint16_t destPort;
uint16_t localPort;
};
int main(int argc, char *argv[]) {
NodeContainer senderNode, receiverNode;
senderNode.Create(1);
receiverNode.Create(1);
// WiFi setup
WifiHelper wifi;
wifi.SetStandard(WIFI_PHY_STANDARD_80211n_5GHZ);
WifiMacHelper mac;
mac.SetType(“ns3::AdhocWifiMac”);
YansWifiPhyHelper phy = YansWifiPhyHelper::Default();
YansWifiChannelHelper channel = YansWifiChannelHelper::Default();
phy.SetChannel(channel.Create());
NetDeviceContainer senderDevice = wifi.Install(phy, mac, senderNode);
NetDeviceContainer receiverDevice = wifi.Install(phy, mac, receiverNode);
// Mobility setup
MobilityHelper mobility;
mobility.SetMobilityModel(“ns3::ConstantPositionMobilityModel”);
mobility.Install(senderNode);
mobility.Install(receiverNode);
// Internet stack and routing
AodvHelper aodv;
InternetStackHelper internet;
internet.SetRoutingHelper(aodv);
internet.Install(senderNode);
internet.Install(receiverNode);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer senderInterfaces = address.Assign(senderDevice);
Ipv4InterfaceContainer receiverInterfaces = address.Assign(receiverDevice);
// Install applications
ApplicationContainer senderApp, receiverApp;
// Sender application
Ptr<CryptoApplication> senderCryptoApp = CreateObject<CryptoApplication>();
senderCryptoApp->SetRemote(receiverNode.Get(0)->GetObject<Ipv4>()->GetAddress(1, 0).GetLocal(), 9);
senderCryptoApp->SetLocalPort(10);
senderNode.Get(0)->AddApplication(senderCryptoApp);
senderCryptoApp->SetStartTime(Seconds(1.0));
senderCryptoApp->SetStopTime(Seconds(20.0));
senderApp.Add(senderCryptoApp);
// Receiver application
Ptr<CryptoApplication> receiverCryptoApp = CreateObject<CryptoApplication>();
receiverCryptoApp->SetLocalPort(9);
receiverNode.Get(0)->AddApplication(receiverCryptoApp);
receiverCryptoApp->SetStartTime(Seconds(1.0));
receiverCryptoApp->SetStopTime(Seconds(20.0));
receiverApp.Add(receiverCryptoApp);
Simulator::Stop(Seconds(20.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
So now we have discussed earlier about how the Cryptography will analyze the performance in ns3 environment .We support further information about how the Cryptography programming concepts that will adjust in different environments.