Provided is a computer-implemented method for securely receiving data via a third-party webpage, including: generating configuration data in response to a request from a first system, the configuration data including a public key of a first key pair; digitally signing the configuration data based on a private key of a second key pair; transmitting the configuration data to the first system, the configuration data including code configured to facilitate the first system to embed a plurality of frames in a webpage, wherein the plurality of frames loads content from a domain that is independent from a domain that hosts the webpage; and verifying the configuration data based on a public key of the second key pair. The computer-implemented method may also include receiving, from a master frame of the plurality of frames, encrypted data. Systems and computer program products are also provided.