Securely rendering online ads in a host page

A system for coordinating online ad content on a host page, the system comprising:

• a processor configured to process data for the system;
• a frame-host communication channel creation component operably coupled with the processor, and configured to create a frame-host communication channel between the host page and a first cross-domain frame hosted in the host page;
• and
• a frame-frame communication channel creation component operably coupled with the processor, and configured to create a frame-frame communication channel between the first cross-domain frame and a second cross-domain frame hosted in the host page.

A computer-based method for rendering online ads on a webpage, the method comprising:

• creating host ad space in the host webpage to accommodate an initial size of a first cross-domain frame;
• creating the first cross-domain frame in a host webpage, where the first cross-domain frame comprises content from a different domain than the domain of the host page;
• creating a first inter-frame communication channel comprising a first communication channel between the first cross-domain frame and the host page;
• creating one or more second cross-domain frames in the host page, where the second cross-domain frame comprises content from a different domain than the domain of the host page;
• creating a second inter-frame communication channel comprising a second communication channel between the first cross-domain frame and the second cross-domain frame in the host page, using a computer-based processor, comprising one or more of:
• creating a communications channel that passes communications from the first cross-domain frame to the host page to the second cross-domain frame;
• and
• creating the first cross-domain frame and the second cross-domain frame where both the first and second cross-domain frames comprise content from a same domain;
• and
• securing at least one of the first and second inter-frame communication channels comprising using a list of allowed functionalities for content inside at least one of the first and second cross-domain frames.