Superdense coding is a form of secure quantum communication.<ref name="Wang2005" /> If an eavesdropper, whichcommonly may be referred to ascalled Eve, intercepts Alice's qubit en route to Bob, all that is obtained by Eve is part of an entangled state. Without access to Bob's qubit, Eve is unable to get any information from Alice's qubit. A third party is unable to eavesdrop on information being communicated through superdense coding and an attempt to measure either qubit would collapse the state of that qubit and alert Bob and Alice.
