Aspects of the disclosure relate to utilizing federated user identifiers to enable secure information sharing. A computing platform may receive, from an external application host platform, a federated login request comprising user identification information associated with a user account. Based on receiving the federated login request, the computing platform may send, to a client computing device linked to the user account, a push notification prompting a user of the client computing device to authenticate. Then, the computing platform may authenticate the user of the client computing device to the user account. Based on authenticating the user, the computing platform may generate an orchestration message directing a data hub platform to initiate a validated data transfer with the external application host platform and may send the orchestration message to the data hub platform to initiate a transfer of external information associated with the user of the client computing device.