Secure Online Banking Transaction System with Cryptography

The rapid adoption of digital financial services has increased the demand for secure, reliable, and efficient online banking platforms. However, the rise in cyber-attacks, identity theft, and unauthorized transactions continues to undermine user trust and expose critical vulnerabilities in existing systems. This study presents the design and development of a secure online banking transaction system that integrates advanced cryptographic techniques to ensure confidentiality, integrity, and authentication of financial data. The system incorporates a hybrid cryptographic model combining symmetric and asymmetric encryption to safeguard transaction processes, user credentials, and communication channels. Multi-factor authentication (MFA) and secure session management are also implemented to strengthen access control and mitigate common attack vectors such as phishing, man-in-the-middle attacks, and brute-force intrusions. A prototype of the system was developed and evaluated through functional testing, security analysis, and performance benchmarking. Results indicate that the proposed solution enhances transactional security while maintaining system efficiency and usability. The study demonstrates that cryptography, when properly integrated into online banking architecture, can significantly improve the resilience of digital financial systems against emerging cybersecurity threats.