A computer-implemented method for notifying a client application of an event by preventing the setup of a TLS (Transport Layer Security) secure connection between the client application and a destination server is provided. The method comprises receiving a client Hello message from a client application directed to the destination server, preventing the client Hello message from reaching the destination server, constructing a server Hello message such that the message appears to originate from the destination server, constructing a dummy certificate containing the event, constructing a Certificate message that includes the dummy certificate and appears to originate from the destination server, and transmitting the server Hello message and the Certificate message to the client application.