Quantum Leap in Financial Security: Hybrid Cryptography Approach
Uma Pratap Madje, Arati Sameer Nimgaonkar, Lakhichand Khushal Patil +1 more
Many traditional encryption techniques commonly used in financial systems face serious threats from the rapid development of quantum computing. Quantum attacks based on Shor's and Grover's algorithm are effective against the RSA, and ECC methods that secure online banking, digital payments, and interbank communications. To mitigate on this increasing risk, this paper suggests hybrid cryptographic architecture based on symmetric encryption, post-quantum cryptography (PQC), and quantum key distribution (QKD) for secure financial transactions. The Quantum-resistant security significance comes because the financial models produce massive data sets for fraud detection and predictive risk. Not only does it offer the previously unreachable computational capabilities, but also utilizes the potentials of large-scale financial data analytics to make the decision-making process fast and well informed, and in this light, the present research recommends a hybrid cryptographic approach with an integrated security framework for the financial sector that combines symmetric encryption, post-quantum cryptography (PQC), and quantum key distribution (QKD). The proposed structure relies on (1) the quantum-resistance of PQC for resilience and authentication, (2) the information-theoretic security of QKD for key establishment, and (3) the efficacy of symmetric cryptography for protecting high-throughput transactions. The framework covers the short-term practical limitations and long-term quantum risks based on the combined use of quantum and conventional security primitives. This paper points out the role and transformation of digital financial ecosystem in the quantum era by elaborating challenges, opportunities and future of quantum cryptography in the banking industry.
International Conference on Computing for Sustainable Global Development•Apr 8, 2026•0 citations