In network system, cryptography is vital for securing communication. We can use network simulation tool provided by OMNeT++ to simulate a different cryptography methods and their applications in Network security. In the below, we provided some cryptography project samples that can be accomplished in OMNeT++:

**Simulation of Secure Communication Using Symmetric Encryption**

**Objective:**Use symmetric encryption algorithms such as AES (Advanced Encryption Standard) to mimic secure interaction amongst network nodes.**Implementation:**Generate a network that has data which could be transmitted amongst nodes. Execute AES encryption at the sender node and decryption at the receiver node. Make sure the data privacy by capturing and evaluating the encrypted traffic.**Extension:**Simulate various kinds of attacks (like brute-force, chosen plaintext) and estimate the strength of the encryption algorithm.

**Public Key Infrastructure (PKI) Simulation**

**Objective:**Simulate a Public Key Infrastructure (PKI) for secure communication, containing the generation, distribution, and validation of digital certificates.**Implementation:**Develop a network in which the nodes can utilize public and private keys for secure communication. Implement a Certificate Authority (CA) that distributes digital certificates to nodes. Use these certificates to simulate secure data exchange amongst nodes.**Extension:**Simulate setups like certificate revocation, man-in-the-middle attacks, and evaluate how PKI supports in mitigating these intimidations.

**Digital Signatures for Data Integrity and Authentication**

**Objective:**Mimic the use of digital signatures to make sure data integrity and validate the sender in a network communication.**Implementation:**Deploy digital signature creation and validation using algorithms like RSA or ECDSA. Nodes sign the data before sending it, and the receiver certifies the signature to certify authenticity and integrity.**Extension:**Simulate attacks like message tampering or counterfeit and establish how digital signatures detect and prevent these attacks.

**Simulation of Secure Key Exchange Protocols**

**Objective:**Imitate secure key exchange protocols like Diffie-Hellman or Elliptic Curve Diffie-Hellman (ECDH) to launch a shared secret amongst nodes.**Implementation:**Design a network where nodes use the Diffie-Hellman protocol to transmit keys securely. After the shared secret implementation, use it to encrypt communication amongst the nodes.**Extension:**Simulate potential attacks on key exchange protocols (such as man-in-the-middle) and Execute countermeasures to protect the transmission.

**Simulation of End-to-End Encryption in a Messaging System**

**Objective:**To make certain that the messages are encrypted from the sender to receiver, we have to simulate the end-to-end encryption in a messaging system, preventing intermediaries from accessing the content.**Implementation:**Set up a messaging system where each message is encrypted at the sender node and decrypted at the receiver node. Use asymmetric encryption for key exchange and symmetric encryption for the authentic message content.**Extension:**Execute features like forward secrecy, where each session uses a distinct key, and assess the influence on security and performance.

**Simulation of Blockchain-Based Cryptographic Security**

**Objective:**Mimic the use of blockchain technology to offer cryptographic security for transactions and data transmissions in a network.**Implementation:**Deploy a blockchain in a peer-to-peer network, where each block includes a cryptographic hash of the erstwhile block, a timestamp, and transaction data. Nodes use digital signatures to validate transactions.**Extension:**Simulate various consensus algorithms like Proof of Work (PoW) or Proof of Stake (PoS) and assess their affect on network security and performance.

**Simulation of Homomorphic Encryption for Secure Data Processing**

**Objective:**Permit estimation on encrypted data deprived of needing to decrypt it by simulating homomorphic encryption, ensuring data privacy even during processing.**Implementation:**Execute a network where data is encrypted before being sent to a processing node. The processing node achieves operations on the encrypted data and returns the result, which is decrypted by the receiving node.**Extension:**Assess the performance impact of homomorphic encryption on the network and compare it with traditional encryption methods.

**Simulation of Secure Multi-Party Computation (SMPC)**

**Objective:**Imitate secure multi-party computation protocols that permit numerous parties to jointly estimate a function over their inputs while charge those inputs private.**Implementation:**Execution SMPC in a network where several nodes steadily compute a joint function deprived disclosing their private inputs. Utilize cryptographic protocols like secret sharing or garbled circuits.**Extension:**Mimic various use cases includes secure voting, privacy-preserving data analytics, and compute the trade-offs amongst security and computation overhead.

**Quantum Cryptography Simulation**

**Objective:**Simulate quantum key distribution (QKD) to make sure secure communication by misusing the principles of quantum mechanics.**Implementation:**Execute the basic version of the BB84 protocol in a network, where two nodes transmit quantum bits (qubits) to accomplish a shared secret key. Use this key for encrypting subsequent communication.**Extension:**Simulate potential attacks like eavesdropping and determine how quantum cryptography offers security pledges that classical cryptography cannot provide.

**Simulation of Cryptographic Hash Functions for Data Integrity**

**Objective:**Simulate the use of cryptographic hash functions (like SHA-256) to ensure data reliability by configuring distinct hash values for data blocks.**Implementation:**Develop a network where data packets are hashed before transferred and the receiver certifies the hash value to make certain the data has not been interfered with.**Extension:**Execute hash-based message authentication codes (HMAC) to offer both data reliability and validation, and simulate attacks to examine the flexibilitly of the hash function.

**Steganography and Cryptography in Network Communication**

**Objective:**Hide and secure messages inside other data streams like images or audio files, exchanged through the network by simulating the use of steganography concatenated with cryptography.**Implementation:**Execute a steganographic method to implant encrypted messages inside multimedia files. Exchange these files over the network and citation the hidden message at the receiver end.**Extension:**Simulate various steganographic methods and assess their detectability, sturdiness, and the security offered by the extra cryptographic layer.

**Simulation of Password-Based Cryptographic Security**

**Objective:**Mimic password-based encryption and decryption methods to protect data depend on user-generated passwords.**Implementation:**Execute PBKDF2 (Password-Based Key Derivation Function 2) or bcrypt in a network situation where users encrypt data with passwords. Imitate the key derivation process and data encryption/decryption according to the user passwords.**Extension:**Simulate password cracking tries like brute-force or dictionary attacks, and analyze the security offered by various password policies and key stretching methods.

**Simulation of Zero-Knowledge Proofs for Authentication**

**Objective:**Replicate zero-knowledge proofs (ZKP) as a technique of validation in which one member proves to another that they understand the value deprived of revealing the value itself.**Implementation:**Execute a network where nodes validate one another using ZKP protocols, ensuring that no sensitive information is transmitted as they process.**Extension:**Discover various ZKP protocols like zk-SNARKs (Zero-Knowledge Succinct Non-Interactive Arguments of Knowledge), and evaluate their application in securing interactions in a disseminated network.

Overall, we offered some samples with a brief demonstration regarding Cryptography projects using OMNeT++ tools and techniques like encryption and decryption for security purpose. We deliver more samples in another simulation, if needed.

Explore a diverse range of cryptography project examples utilizing the OMNeT++ tool. We provide you with top-notch simulation ideas covering various cryptography techniques and their applications in network security through OMNeT++. Let our developers help you achieve outstanding project performance