A computing device can generate an iFrame on a particular website hosted on a server. The computing device can receive payment data from the iFrame corresponding to a transaction on the particular website. The computing device can generate an eToken corresponding to the received payment data. The computing device can transmit the eToken to the server. The computing device can receive transaction data comprising the eToken and non-sensitive payment data corresponding to the transaction from the server. The computing device can determine the received payment data based on authenticating the eToken. The computing device can process the transaction.