Title: File transfer using cryptography
Abstract:
This paper explores the implementation of secure file transfer using cryptography techniques within the PHP programming language. With the increasing reliance on digital communication and data exchange, ensuring the confidentiality and integrity of transferred files has become paramount. The proposed solution leverages PHP’s cryptographic libraries to establish a secure communication channel between the client and server, employing symmetric and asymmetric encryption algorithms for data confidentiality and digital signatures for integrity verification. Through a step-by-step approach, the paper elucidates the process of encrypting files before transmission and decrypting them upon receipt, safeguarding sensitive information from unauthorized access and tampering. Furthermore, considerations such as key management, secure protocols, and performance optimization are addressed to enhance the robustness and efficiency of the file transfer system. The implementation demonstrates the practical application of cryptographic principles in PHP for secure file exchange, catering to diverse scenarios ranging from personal file sharing to enterprise-level data transfer, thereby contributing to the broader discourse on cybersecurity in web development.