An IT security manager has noticed a recent uptick in confidential information being leaked through casual conversations on the company's authorized instant messaging (IM) platform. While reviewing the IM security policies, what should the manager implement to reduce the risk of data leakage through IM chats?
Enforce end-to-end encryption for all IM communications
Assign dedicated staff to manually review IM message logs for sensitive data
Configure Data Loss Prevention (DLP) policies on the IM system
Restrict file permissions for users on the network