Privacy Protected Modified Double Ratchet Algorithm for Secure Chatbot Application

Our world has been revolutionized as a result of digitalization. Large amounts of data are regularly generated as a result of the well-known World Wide Web, various social networking sites, and an infinite number of apps. Personal assistants are proof of the growing popularity of chatbots. Conversational AI developers need to be aware of any potential threats or flaws in existing designs, as well as how hackers may exploit those flaws, if they want their creations to be secure. The concept of “chatbot” refers to a piece of software that is executed on a computer and has the ability to engage in conversation with human users while also processing the content of such talks. Users are also able to connect and communicate with digital gadgets via the use of chatbots (such as smartphones and tablets). According to the authors, it is also referred to as “one of the most sophisticated and promising representations of interactions between people and robots.” Its primary function is to assist students by responding to their inquiries. The chatbots that are currently available are not entirely secure, and it is possible that they could provide opportunities for information flowing through the chatbot interface to be accessed by cybercriminals or hackers. As a direct consequence of this, the chatbot will be made secure by utilizing authentication (session) timeouts in combination with encryption mechanisms. During the transport of data from one end system to another, encryption is used to prevent outsiders from gaining access to the information being sent. The data is encrypted as soon as it leaves the machine of the sender, and the only person who will be able to decrypt it is the recipient to whom it is intended to be sent. It is probable to set a time limit on how long an authorized user may remain “logged in,” which prevents cyber attackers from being able to guess their way into someone else’s protected account by using authentication (session) timeout. “In this research paper, the Double Ratchet algorithm is modified with Paillier Cryptosystems. Our Privacy Protected Modified model is secure in key as well as message data through network attacks.