The Cash app uses state-of-the-art encryption and fraud detection technology to ensure the security of your data and money. Any information you send is encrypted and securely sent to our servers, regardless of whether you are using a public or private Wi-Fi connection or data services. The Cash Team or Cash App Email will only contain links to sites on square.com, squareup.com, cash.app, or cash. Me. If an email contains links to other sites, it was NOT sent by Square. You can visit our website also.