How to Implement Network Data Transmission in OMNeT++
To implement the network data transmission privacy in OMNeT++, we have to make sure that the data being transmitted is guarded against the illegal access or eavesdropping over the network. It can be achieved by mimicking encryption, authentication and secure key transfer mechanisms inside the network. Follow the provided guide to implement the privacy policy in OMNeT++:
Step-by-Step Implementation:
- Set Up OMNeT++ and INET Framework
- Install OMNeT++: Make certain that you have installed and configured the OMNeT++ properly.
- Install INET Framework: Download and install the INET framework, which offers models for networking protocols and security mechanisms.
- Define the Network Topology
Generate a network topology with multiple nodes that will communicate securely. These nodes will execute data transmission privacy with the help of a custom protocol.
Example NED File (SecureNetwork.ned):
package mynetwork;
import inet.node.inet.StandardHost;
import inet.node.inet.Router;
network SecureNetwork
{
parameters:
int numNodes = default(3); // Number of nodes in the network
submodules:
node[numNodes]: StandardHost {
@display(“p=100,100;is=square,red”);
}
router: Router {
@display(“p=300,200”);
}
connections allowunconnected:
for i = 0..numNodes-1 {
node[i].ethg++ <–> ethernetLine <–> router.ethg++;
}
}
- Create a Data Transmission Privacy Protocol
Before sending it and decrypting it upon receipt, encrypt the data to generate a custom protocol that imitates the secure data transmission.
Example: Secure Transmission Protocol (SecureTransmissionProtocol.ned)
package mynetwork;
import inet.applications.base.ApplicationBase;
simple SecureTransmissionProtocol extends ApplicationBase
{
gates:
input upperLayerIn;
output upperLayerOut;
input lowerLayerIn;
output lowerLayerOut;
}
SecureTransmissionProtocol.cc (Basic Implementation)
#include “inet/common/INETDefs.h”
#include “inet/applications/base/ApplicationBase.h”
#include <string>
#include <sstream>
#include <bitset>
Define_Module(SecureTransmissionProtocol);
void SecureTransmissionProtocol::initialize(int stage) {
ApplicationBase::initialize(stage);
if (stage == INITSTAGE_LOCAL) {
encryptionKey = par(“encryptionKey”).stringValue();
}
}
void SecureTransmissionProtocol::handleMessageWhenUp(cMessage *msg) {
if (msg->getArrivalGate() == upperLayerIn) {
handleUpperMessage(msg);
} else if (msg->getArrivalGate() == lowerLayerIn) {
handleLowerMessage(msg);
}
}
void SecureTransmissionProtocol::handleUpperMessage(cMessage *msg) {
std::string originalData = msg->getName();
std::string encryptedData = encryptData(originalData);
EV << “Original Data: ” << originalData << “, Encrypted Data: ” << encryptedData << “\n”;
cMessage *encryptedMsg = new cMessage(encryptedData.c_str());
sendDown(encryptedMsg);
delete msg;
}
void SecureTransmissionProtocol::handleLowerMessage(cMessage *msg) {
std::string encryptedData = msg->getName();
std::string decryptedData = decryptData(encryptedData);
EV << “Encrypted Data: ” << encryptedData << “, Decrypted Data: ” << decryptedData << “\n”;
cMessage *decryptedMsg = new cMessage(decryptedData.c_str());
sendUp(decryptedMsg);
delete msg;
}
std::string SecureTransmissionProtocol::encryptData(const std::string &data) {
std::stringstream encrypted;
for (size_t i = 0; i < data.size(); ++i) {
encrypted << std::bitset<8>(data[i] ^ encryptionKey[i % encryptionKey.size()]).to_string();
}
return encrypted.str();
}
std::string SecureTransmissionProtocol::decryptData(const std::string &data) {
std::stringstream decrypted;
for (size_t i = 0; i < data.size(); i += 8) {
std::bitset<8> bits(data.substr(i, 8));
char c = bits.to_ulong() ^ encryptionKey[i / 8 % encryptionKey.size()];
decrypted << c;
}
return decrypted.str();
}
void SecureTransmissionProtocol::finish() {
// Cleanup if needed
}
In this sample:
- encryptionKey: A simple XOR encryption key is used for the encryption and decryption process.
- encryptData(): Mimic encrypting the data by XORing it with the encryption key.
- decryptData(): Decrypts the data by XORing it back with the encryption key.
- handleUpperMessage(): Encrypts the outgoing data before sending it.
- handleLowerMessage(): Decrypts the incoming data after receiving it.
- Configure the Simulation
Use the custom secure transmission protocol by setting up the simulation in the omnetpp.ini file.
Example Configuration in omnetpp.ini:
network = SecureNetwork
**.node[*].applications[0].typename = “SecureTransmissionProtocol”
**.node[*].applications[0].encryptionKey = “simplekey”
- Run the Simulation
Run the simulation and manage how data is encrypted before being transmitted and decrypted after being received. You can observe the output to evaluate that the original data is properly encrypted and then decrypted.
- Verify Data Transmission Privacy
After running the simulation, certify that the data is securely transmitted by making sure that the encrypted data cannot be easily construed without the key and that the decryption process appropriately restores the original data.
- Extend the Secure Transmission Protocol
You can extend the basic secure transmission protocol to contain more advanced security features like:
- Symmetric Encryption: Execute more sophisticated encryption algorithms like AES.
- Asymmetric Encryption: Execute public-private key encryption mechanisms for secure key exchange.
- Digital Signatures: Attach digital signatures to make certain the data integrity and authenticity.
Example: Adding a Simple Digital Signature
std::string SecureTransmissionProtocol::signData(const std::string &data) {
std::hash<std::string> hash_fn;
size_t hash = hash_fn(data + encryptionKey);
return std::to_string(hash);
}
bool SecureTransmissionProtocol::verifySignature(const std::string &data, const std::string &signature) {
return signData(data) == signature;
}
void SecureTransmissionProtocol::handleUpperMessage(cMessage *msg) {
std::string originalData = msg->getName();
std::string encryptedData = encryptData(originalData);
std::string signature = signData(originalData);
EV << “Original Data: ” << originalData << “, Encrypted Data: ” << encryptedData << “, Signature: ” << signature << “\n”;
cMessage *encryptedMsg = new cMessage((encryptedData + “|” + signature).c_str());
sendDown(encryptedMsg);
delete msg;
}
void SecureTransmissionProtocol::handleLowerMessage(cMessage *msg) {
std::string receivedMsg = msg->getName();
size_t delimiter = receivedMsg.find(‘|’);
std::string encryptedData = receivedMsg.substr(0, delimiter);
std::string receivedSignature = receivedMsg.substr(delimiter + 1);
std::string decryptedData = decryptData(encryptedData);
if (verifySignature(decryptedData, receivedSignature)) {
EV << “Decrypted Data: ” << decryptedData << “, Signature Verified\n”;
cMessage *decryptedMsg = new cMessage(decryptedData.c_str());
sendUp(decryptedMsg);
} else {
EV << “Signature Verification Failed\n”;
}
delete msg;
}
- Document and Report Findings
After completing the simulations, document the encryption strategies assessed, the results acquired and any security enhancements made. This will help in understanding the efficiency of various encryption mechanisms in securing network data transmissions.
In Conclusion, we appropriately implemented the network Data Transmission Privacy in OMNeT++ using mechanisms like security transmission protocol to use their features for the confidentiality of the data being transmitted across the network.
Omnet-manual.com offers a wealth of unique topics and ideas, along with expert support for network comparison analysis. When it comes to implementing network data transmission privacy in the OMNeT++ tool, we are here to provide you with top-notch guidance and tailored assistance.