Web Application for Secure Transmission of Data

Abstract

In the modern digital era, the secure transmission of data over the internet in the digital world is highly required due to the rising growth in cybercrime incidents. Upon completion of the research work in the digital domain, it will be possible to develop an entire web-based application based on the concept of secure data transmission by using a combination of different hybrid techniques of cryptography based on AES, along with the RSA key exchange algorithm. With proper implementation, the strengths of both the encryption standards could be utilized while the weaknesses of the respective standards could be avoided. The application is developed with HTML and CSS for the frontend, an intuitive interface, while Python\'s Flask framework and MySQL are used as the server side for robust backend processing. This creates a smooth experience for the users in encrypting and also decrypting the information in a secure manner. Here, the Fernet symmetric authenticated encryption scheme from the Python Cryptography Library has been used for effective deployment of the algorithms within the given architecture. Further, the performance evaluation of the proposed model ensures the achievement of the best standards in terms of security and the level of processing efficiency, making it highly suitable for the practical implementation of secure communication within the domain. Thus, the proposed model can solve the challenges of ef?ciency alongside the security challenges that occur within the environment of secure communications.

Introduction

The text discusses the growing need for robust data security solutions due to the rapid expansion of internet usage and increasing cyber threats such as unauthorized access and data breaches. It emphasizes cryptography as the foundation of information security, highlighting the strengths and limitations of both symmetric and asymmetric encryption techniques. While AES (Advanced Encryption Standard) offers high-speed, secure encryption for large data volumes, it suffers from the key distribution problem. RSA, an asymmetric algorithm, resolves secure key exchange but is computationally inefficient for encrypting large datasets.

To address these limitations, the study proposes a hybrid encryption system that integrates AES and RSA within a web-based application. In this model, AES-256 is used for efficient data encryption, while RSA securely encrypts and exchanges the AES key, combining performance with strong security. The system is implemented using a client–server architecture with a user-friendly web interface, Flask-based backend, and a MySQL database, incorporating secure authentication and role-based access control.

Experimental results demonstrate that the hybrid approach achieves fast encryption and decryption with high integrity across different file types and sizes (up to 10 MB), significantly outperforming RSA-only solutions. Security testing confirms resistance to brute-force attacks, unauthorized access, and data tampering.

The discussion concludes that the AES–RSA hybrid model provides an optimal balance between security and performance, making it suitable for real-time web applications such as secure file sharing, cloud storage, healthcare data exchange, and financial transactions. The system enhances accessibility to advanced cryptography for end users, with future improvements suggested in areas such as digital signatures, algorithm agility, and mobile platform support.

Conclusion

Overall, the study has effectively created and evaluated a comprehensive internet application that is able to facilitate secure data transmission via a technique employing the best features of both symmetric and asymmetric data encryption. Implementation of the AES technique has proved highly successful for the efficient encryption of data via the utilization of a technique employing the features of both symmetric and asymmetric data encryption. It can be seen that the proposed system fulfils its proposed objectives with a facility that can perform user-friendly and understandable file encryption as well as decryption, even for users who are not highly proficient in matters of information security. The proposed approach also passed performance evaluations that showed that not only does it perform optimally, but it also ensures that there are strong security standards, enough to counter current cyber threats, with the two concepts covering each other well, as one method does not have what the other lacks. It successfully implemented hybrid encryption using current, open standards for encryption algorithms. The intuitive web interface is easily accessible from any modern browser. It has very efficient processing times for files up to 10 MB, with linear scalability. Key management mechanisms are secure, ensuring protection for the cryptographic keys throughout their life cycle. Authentication and authorization controls are strong, preventing unauthorized access. This system demonstrates how sophisticated cryptographic security can be made available without compromising rigor in security. Future enhancements may be the support for large files by the use of streaming encryption, the use of digital signatures for authentication and non-repudiation, more encryption algorithms to enable algorithm agility, the development of mobile applications for a wider platform support, and the implementation of advanced key management features, including key rotation and escrow mechanisms in enterprise deployments. With this, the web application demonstrates that hybrid cryptography systems show practical and deployable solutions to provide security in modern digital communications; thus, a balance between the two important and competing requirements of security strength and computational efficiency can be well achieved. The research applied therein proves that any efficient and sound cryptographic implementation could be robust for protection while remaining practical for everyday usage.

References

[1] Prashant, Md Sohail Haque, Amrinder Kaur, Pankaj Yadav. (2024). Comparative Analysis of AES and RSA with Other Encryption Techniques for Secure Communication. International Journal of Scientific Research in Computer Science, Engineering and Information Technology. [2] Sood, Kaur, S. A Literature Review on RSA, DES, and AES Encryption Algorithms. SCRS Publications. [3] Singh, Supriya. A Study of Encryption Algorithms (RSA, DES, 3DES, and AES) for Information Security. International Journal of Computer Applications. [4] Kumari, Mahato, T. K. (2025). The Evolution of Secure Communication: Analysing Cryptographic Methods from Ancient to Modern Era. International Research Journal. [5] Globus Toolkit Documentation. Security and Encryption Concepts in Distributed Systems.

Copyright

Copyright © 2026 Rama Subbarao Mamidipalli, Gangadhar Rao Mallavarapu, Rakesh Surya Gangadhar Mangam, Satya Siva Rama Krishna Bonthu, Rohith Sai Ramareddy Bethireddy, Ganga Bhavani B. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.