Twilio has announced Flex Conversations to build tailor-made experiences between Customers and Agents on Flex. This announcement led to the development of a proof-of-concept for end-to-end encryption in WebChat, making it secure that only the Agent and the Customer can read messages, including attachments. The encryption is based on public key cryptography and uses the Diffie–Hellman–Merkle key exchange method. The implementation involves creating pairs of private and public keys for both customers and agents, with the customer sharing their public key with the agent and vice versa. This process prevents unintended users from reading or modifying data when only intended readers should have access. However, there are known limitations to this implementation, including chat transfer and conference features, as well as compatibility issues with park an interaction feature and supervisor visibility. To implement end-to-end encryption in WebChat on Flex, developers must follow specific prerequisites and steps, which include installing the necessary plugins and testing the functionality.