Methods and systems for receiving sensitive information include receiving a request for entering sensitive information, the request received from a user interface rendered on a client device. The methods and systems rely upon nested iframes, each of which is hosted by a different server. An inner iframe is hosted by a server within a secure zone, such as a digital vault. A middle iframe is hosted within the secure zone and is invoked by an intermediate server. An outer iframe is hosted by a server that provides the user interface. The server that provides the user interface may be hosted by a cloud service provider, for example. Using the nested iframes and the network topology described in the present disclosure, users are able to exchange sensitive information with a server within the secure zone through a user interface provided outside the secure zone.