提出一个无信息泄露的受控双向量子安全直接通信协议.协议中合法通信双方Alice和Bob在控制者Charlie的控制下实现彼此秘密信息的安全交换，利用3个Bell态纠缠交换后的测量相关性来克服信息泄露问题.由于该协议仅利用Bell态作为量子资源，而且仅需要进行Bell测量，所以方便实现.安全性分析表明，该协议不仅能检测到外部窃听者的主动攻击，而且还能检测到控制者Charlie的不诚实行为，因此，具备良好的安全性.

A controlled bidirectional quantum secure direct communication protocol without information leakage was proposed. In the proposed protocol, two authenticated communication parties, Alice and Bob, were able to securely exchange their secret messages simultaneously under the control of the controller, Charlie. The problem of information leakage was overcome by making full use of the measurement correlation property after entanglement swapping among three Bell states. Moreover, the proposed protocol merely took the Bell state as quantum resource and merely needed the Bell measurement so that it was convenient to implement. Security analysis shows that the proposed protocol can detect not only the active attacks from the outside eavesdropper, but also the dishonest behavior from the controller, Charlie. It can be concluded that the proposed protocol has good security.