Patent attributes
When a customer service representative (CSR) calls a customer, the customer may be able to authenticate himself or herself by providing the CSR with personal identifying information. However, the CSR may be unable to provide information to authenticate himself or herself to the customer. Thus, this patent document describes authentication techniques that can allow the CSR to authenticate himself or herself to the customer. For example, before or during a call that the second person (e.g., CSR) initiates to call a first person (e.g., customer), a notification message may be sent to the first person's user device. The content of notification message displayed on the user device may provide information to the first person which can allow the first person to determine whether the second person is trustworthy.