A method operates to detect personal identifying or account information exchanged in a real-time electronic communication occurring between computer network users, such as electronic chat. A detected personal identifier may be recognized as an attempt on the part of one user to engage in a phishing attack upon another user or to otherwise steal the other user's sensitive personal information. Upon recognizing the communication as an unwarranted attempt to collect such information, the electronic communication may be monitored, and communication of the personal information may be prevented.