Quantum cryptography using the BB84 protocol is at the forefront of modern secure communication. This paper emphasizes on BB84 protocol and its role in secure key distribution utilizing the Qiskit libraries in Python to simulate Quantum Key distribution (QKD). This QKD is then applied to the One-Time Pad algorithm for message encryption and decryption. Ensuring data confidentiality and integrity and is difficult due to advanced cyber threats and the potential of quantum computing to undermine traditional cryptographic methods. Current encryption techniques are susceptible to quantum related attacks, risking the decryption of sensitive data. Alice (sender) and Bob (receiver) use classical encryption to communicate but eavesdropper Eve with quantum capabilities, can potentially decrypt their messages. This vulnerability affects critical data security in finance, healthcare, and national security, making robust cryptographic solutions essential for maintaining trust and safety in digital communications. Our work emphasis the utilization of the quantum key generated by employing the BB84 protocol with the help of Qiskit library in python as cipher text in the process of one time pad encryption and decryption. This encrypted data dispatched between the sender and receiver to ensure maximum security, confidentiality and integrity over the period of communication.
Quantum cryptography using the BB84 protocol is at the forefront of modern secure communication. This paper emphasizes on BB84 protocol and its role in secure key distribution utilizing the Qiskit libraries in Python to simulate Quantum Key distribution (QKD). This QKD is then applied to the One-Time Pad algorithm for message encryption and decryption. Ensuring data confidentiality and integrity and is difficult due to advanced cyber threats and the potential of quantum computing to undermine traditional cryptographic methods. Current encryption techniques are susceptible to quantum related attacks, risking the decryption of sensitive data. Alice (sender) and Bob (receiver) use classical encryption to communicate but eavesdropper Eve with quantum capabilities, can potentially decrypt their messages. This vulnerability affects critical data security in finance, healthcare, and national security, making robust cryptographic solutions essential for maintaining trust and safety in digital communications. Our work emphasis the utilization of the quantum key generated by employing the BB84 protocol with the help of Qiskit library in python as cipher text in the process of one time pad encryption and decryption. This encrypted data dispatched between the sender and receiver to ensure maximum security, confidentiality and integrity over the period of communication.
The rapid advancement of quantum computing poses a serious threat to traditional cryptographic systems such as RSA and Elliptic Curve Cryptography (ECC), which rely on computational difficulty for security. Quantum algorithms like Shor’s and Grover’s have the potential to break or weaken these methods, putting modern communication systems at risk. To address this challenge, this work presents a quantum-safe com-munication framework that combines the BB84 Quantum Key Distribution (QKD) protocol with Post-Quantum Cryptography (PQC) techniques, aiming to ensure secure data exchange in the presence of quantum-capable adversaries. In this system, the BB84 protocol is simulated to enable secure key exchange between two parties over a virtual quantum channel. The generated key is refined through processes such as basis matching, error correction, and privacy amplification using SHA-256 to ensure reliability and secrecy. For secur-ing communication, One-Time Pad (OTP) encryption is used alongside HMAC-SHA3-256 to provide both confidentiality and message integrity. Additionally, file encryption is handled using the XChaCha20-Poly1305 algorithm, selected for its efficiency and strong protection against potential vulnerabilities like nonce reuse. To further enhance security, the framework integrates a hybrid key management approach using the Kyber-512 Key Encapsulation Mechanism (KEM) combined with a Key Deriva-tion Function (KDF), merging classical and quantum-resistant techniques. Experimental results demonstrate the effectiveness of the system, achieving a Quantum Bit Error Rate (QBER) of 2.5% and successful performance in both message and file en-cryption. Overall, this work contributes toward the development of practical and resilient communication systems designed for the emerging quantum era.
As the digital front becomes our new frontier, and digital data becomes increasingly vulnerable to highly sophisticated cyber attacks, conventional encryption approaches may no longer be sufficient to withstand a quantum attack. The focus of this work is to deploy a simulation of the BB84 protocol, one of the first Quantum Key Distribution (QKD) protocols developed by Charles Bennett and Gilles Brassard in 1984. The simulation involves two communicating parties, Alice and Bob, with Bob creating a secret keys generated cryptographically and sending it reliably over to Alice using quantum bits, or qubits. By leveraging quantum mechanics, this protocol ensures that any interception can be identified, thus bolstering both the integrity and confidentiality of the key exchange through scientists' understanding of superposition and the no-cloning principle. In the simulation, the potential of quantum communication to achieve secure key distribution over an insecure channel is demonstrated. Differently from traditional encryption protocols, QKD guarantees security not on computational but on physical basis. The aim of this paper is to show the feasibility and robustness of the BB84 protocol for actual cryptographic applications. This models the protocol between Alice and Bob, which paves the way for quantum-proof encryption systems and is a relevant step towards next generation cyber security.
In the age of quantum computing, classical cryptographic techniques are under increasing threat. Quantum cryptography offers an innovative method for data protection by utilizing the principles of quantum mechanics to achieve unbreakable encryption. With the escalating volume of sensitive information stored in databases, conventional cryptographic techniques are becoming more vulnerable, particularly in light of advancements in quantum computing. This paper explores the application of Quantum Key Distribution (QKD) and quantum cryptographic techniques into database systems to bolster security. By implementing the BB84 protocol and quantum encryption, we propose a secure data communication framework that prevents eavesdropping and data tampering. The study evaluates the feasibility of integrating QKD with existing database systems, demonstrates a simulated implementation using Python, and compares its resilience to classical attacks. Results indicate significant improvement in confidentiality and key exchange security, marking a step toward quantum-resilient database systems.
As we move further into the era of digital transformation, cloud services are becoming a cornerstone across industries such as healthcare, agriculture, and Industry 4.0. These sectors increasingly rely on cloud environments to collect, process, and store vast amounts of data, often integrated with smart devices. While ensuring high availability and efficiency remains vital, the paramount concern is maintaining data security. This challenge becomes even more pressing in a world where quantum computers pose a serious threat to traditional cryptographic methods. Classical encryption schemes, particularly those relying on computational hardness assumptions, are susceptible to quantum attacks. This paper proposes a solution by combining the theoretically unbreakable One-Time Pad (OTP) encryption with quantum-safe key exchange protocols. Through the integration of Quantum Key Distribution (QKD) and post-quantum cryptographic techniques, we outline a robust framework designed to secure communication in the coming quantum era.
Secure communication in cryptographic system, relies on secret key which must be exchanged between a sender and a receiver such that it avoids unauthorized access and can be used to encrypt the plain text and decrypt the cipher text. However, advancement in quantum computing raises concern on the security of information exchanged over the web. As the information on the web is made secure using classical cryptographic mechanisms that are only computationally secure and quantum computers with high computational capability can generate the secrete keys in a very short time. In order to make sure that quantum computers do not breach the security of the network, we need to develop some sort of quantum-resistant mechanisms. Quantum key distribution is one of the quantum-resistant-mechanisms which guarantee secure data communication. It leverages quantum mechanics principles by exchanging the key in quantum states called qubits and any attempt to access the key causes disturbance in the qubits yielding change in their behavior or state, hence signaling the presence of an intruder and making it impossible to be accessed. This paper presents a simulation to establish and exchange secrete keys in quantum environment using BB84 protocol and to determine the efficiency of the system, quantum bit error rate is measured and discussed.
The project “Quantum Cryptography for Secure Messaging” aims to create a highly secure communication system using the BB84 protocol, a key method in quantum key distribution. As traditional encryption systems face growing threats from cyberattacks and future quantum computers, this project provides a future-proof solution for message encryption. It uses simulated quantum bits (qubits) to generate secret keys based on quantum mechanics, ensuring that any eavesdropping attempts can be detected instantly. The process involves encoding binary data into quantum states, securely exchanging keys, and applying them for symmetric encryption of messages. Key features include real-time key generation, automatic encryption and decryption, and intrusion detection. The expected outcome is a working prototype of a secure messaging system that can resist both current and emerging security challenges, highlighting the potential of quantum cryptography as a foundation for the next generation of digital security.