Ammyy Admin uses AES-128 encryption for data transmission. It supports two-factor authentication and permission confirmation (the remote user must click "Allow" for you to connect). Technically, the connection is secure.
Ammyy Admin has a confusing licensing model compared to the subscription models of today. ammyy admin remote desktop
Despite its abuse, some IT professionals still use Ammyy Admin for: Ammyy Admin uses AES-128 encryption for data transmission