Techniques are described for delivering one or more first resources of a page using a first security level, and delivering one or more second resources of a page using a second, different security level. A page is generated to include elements identifying resources to be presented in the page, and the elements may include security level identifiers indicating a security level to be employed in communicating the corresponding resource. Each security level may be associated with a set of security measures that ensure the integrity or confidentiality of the resource while it is communicated. The use of multiple security levels to communicate multiple resources may provide appropriate security for each resource, reducing latency and overhead in page generation, communication, and rendering.