Abstract: Aspects of the disclosure relate to encryption of protected data for data transmission over a web interface. A computing platform may submit, via a first computing device, a query for data associated with a user. The computing platform may receive a search result comprising an attribute of the user. Then, the computing platform may generate, based on the attribute of the user, a data file comprising an attribute identifier associated with the attribute of the user. Then, the computing platform may upload, via a web interface and to a second computing device, the data file comprising the attribute identifier. Subsequently, the computing platform may receive, via the web interface and from the second computing device, an encryption key corresponding to the attribute identifier. Then, the computing platform may store, via the first computing device and in a database, an association between the attribute, the attribute identifier, and the encryption key.