The rapid advancement of quantum computing raises concerns about the long-term security of existing cryptographic systems. In response, this paper presents TeleQNet, a secure communication framework that combines classical encryption with quantum-inspired techniques. The system integrates Quantum Key Distribution based on the BB84 protocol and a simulated quantum teleportation mechanism implemented using Qiskit. To strengthen security, a layered encryption approach is adopted using the Hill Cipher followed by AES-256 encryption. The framework is implemented as a web-based system using React and FastAPI, with an AI-based monitoring module that tracks parameters such as teleportation fidelity, channel noise, and communication latency. Experimental results show that the system achieves high reliability, with teleportation fidelity exceeding 99%, encryption accuracy around 99.5%, and average latency below 120 ms. However, the current implementation is limited to simulation and does not involve real quantum hardware. The results indicate that combining quantum-inspired methods with classical techniques can be a practical approach for building future secure communication systems.
The rapid advancement of quantum computing raises concerns about the long-term security of existing cryptographic systems. In response, this paper presents TeleQNet, a secure communication framework that combines classical encryption with quantum-inspired techniques. The system integrates Quantum Key Distribution based on the BB84 protocol and a simulated quantum teleportation mechanism implemented using Qiskit. To strengthen security, a layered encryption approach is adopted using the Hill Cipher followed by AES-256 encryption. The framework is implemented as a web-based system using React and FastAPI, with an AI-based monitoring module that tracks parameters such as teleportation fidelity, channel noise, and communication latency. Experimental results show that the system achieves high reliability, with teleportation fidelity exceeding 99%, encryption accuracy around 99.5%, and average latency below 120 ms. However, the current implementation is limited to simulation and does not involve real quantum hardware. The results indicate that combining quantum-inspired methods with classical techniques can be a practical approach for building future secure communication systems.
Abstract— The advancement of quantum computing presents significant risks to conventional cryptographic systems that secure modern communication networks. This paper proposes an Adaptive Quantum–Classical Trust Communication System (AQCTCS), a hybrid secure messaging framework designed to enhance resilience against both classical and quantum threats. The system integrates three security layers: AES-256 for classical encryption, Post-Quantum Cryptography (PQC) for quantum-resistant protection, and a BB84-based Quantum Key Distribution (QKD) simulation for high-risk scenarios. A Trust Engine continuously evaluates security indicators, including anomaly detection parameters and Quantum Bit Error Rate (QBER), to compute a dynamic trust score. Based on this score, an Adaptive Security Controller automatically selects the appropriate encryption mode, balancing performance and security. The platform is implemented as a web application using React for the frontend, FastAPI for backend services, and Qiskit for QKD simulation. AQCTCS demonstrates an adaptive, scalable, and future-ready communication architecture suitable for post-quantum environments. Keywords— Quantum Key Distribution, Post-Quantum Cryptography, AES-256, Trust Engine, BB84 Protocol, Adaptive Encryption, Secure Messaging, QBER.
The emergence of quantum computing poses a significant threat to classical cryptographic systems, particularly those relying on mathematical hardness assumptions for key exchange. While symmetric algorithms such as the Advanced Encryption Standard (AES) remain efficient and widely deployed, their long-term security ultimately depends on the secrecy of keys. In this paper, we present a hybrid framework that integrates quantum key distribution (QKD) with AES and DES to enhance key security without altering cipher internals. Using the BB84 protocol as the quantum key generator, we implement a simulation-based system in Qiskit and evaluate it against classical pseudo-random key generation.Our methodology covers five phases: establishing AES/DES baselines, generating quantum random keys, implementing BB84 with basis reconciliation and error detection, integrating quantum keys with AES/DES, and benchmarking across varying key sizes and file sizes. Results demonstrate that AES encryption throughput remains stable (around 250–370 MB/s) regardless of key source, while QKD introduces measurable latency in key generation (around 40–110 seconds for 128–256 bits). Importantly, adversarial interference is reliably detected, with 97.3% accuracy in eavesdropper identification.The findings confirm that while classical systems excel in speed and scalability, QKD offers unmatched, physics-backed security assurances. Our study highlights the practicality of hybrid quantum-classical encryption, providing a foundation for secure communication in the post-quantum era.
As quantum computing continues to advance, many of the encryption methods used in today’s chat applications may no longer be secure. Techniques like RSA and Elliptic Curve Cryptography, which are currently reliable, could be broken by quantum algorithms such as Shor’s algorithm, creating risks for private communication. To address this issue, the project presents a Post-Quantum Secure Chat Application designed to remain secure even in the future. It uses Quantum Key Distribution(QKD), specifically the BB84 protocol, to generate and share encryption keys safely. Since measuring a quantum state changes it, any attempt to intercept the key can be detected. In this system, the key exchange process is simulated using quantum tools. If interference occurs, errors appear, alerting the system. Once a secure key is established, messages are encrypted using quantum-resistant methods to ensure privacy. The application includes a simple web interface for real-time messaging, a backend for handling users and messages, and a quantum module for secure key generation. The results show that the system enables secure communication and can detect eavesdropping attempts. Overall, this project demonstrated how quantum-based techniques can improve cybersecurity and provide a future-ready communication solution.
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.
The rapid progress of quantum computing threatens the long-term reliability of conventionalcryptographic algorithms, driving the urgent need for defenses that remain secure in a postquantum environment. This study introduces a unified hybrid encryption framework thatcombines the BB84-based Quantum Key Distribution (QKD) scheme with classical AES-256encryption, supported by continuous real-time security analytics. Although QKD has beenexamined extensively from a theoretical standpoint, its integration with traditional encryptionmethods for real-world communication is still uncommon. In this work, the complete BB84protocol is implemented using Google’s Cirq platform and augmented with adaptivemonitoring, quantum error diagnostics, and multi-layered security evaluation metrics.Simulation experiments verify the system’s strong performance, achieving an averageQuantum Bit Error Rate (QBER) of 4.5%, key reconciliation efficiency of 89.2%, and reliableencrypted data exchange. The platform further enables immediate detection of eavesdroppingattempts and detailed visualization of security states, thereby closing existing gaps in hybridquantum-classical encryption research and advancing the development of practical quantumsafe communication infrastructures.
The accelerating development of quantum computing capabilities poses an unprecedented challenge to conventional encryption methodologies that currently underpin global digital security infrastructure. Classical cryptographic systems, including widely adopted standards such as RSA and AES, derive their security from the computational intractability of specific mathematical problems, a foundation that quantum algorithms threaten to fundamentally undermine. This research presents a comprehensive investigation into the practical implementation of Quantum Key Distribution as a transformative approach to establishing unconditionally secure communication channels. Through experimental deployment of the BB84 protocol augmented with advanced quantum error correction and privacy amplification techniques, we systematically evaluate the performance characteristics and security guarantees of QKD in realistic network environments. Our experimental framework achieves a secure key generation rate of 2.5 megabits per second while maintaining an average quantum bit error rate of 3.2 percent, demonstrating the practical viability of quantum-secured communication. The implementation exhibits exceptional eavesdropping detection capabilities with a 98.5 percent success rate in identifying unauthorized interception attempts. Comparative security analysis reveals that QKD-based encryption reduces vulnerability to brute-force attacks by 65 percent when contrasted with classical encryption standards. The integration of lattice-based post-quantum cryptographic algorithms provides an additional security layer against store-now-decrypt-later attack strategies. These findings substantiate the position of Quantum Key Distribution as a cornerstone technology for next-generation cybersecurity frameworks, offering robust protection against both current threats and the anticipated capabilities of large-scale quantum computers.