Abstract: The present disclosure relates to linking of computer devices for performing tokenized payment transactions, for example linking a web browser operating on a first computing device such as a desktop or laptop computer with a mobile computing device such as a smartphone or tablet. This may allow for a payer to shop using a first computing device, but to arrange payment using a second computing device such as a mobile computing device like a smart phone, tablet, or similar. The mobile computing device may have an app installed that is used to arrange the tokenized transaction, for example a banking app provided by a financial institution. The banking app may provide enhanced security.