A method for authentication facilitated via a trusted execution environment includes: reading payment credentials in a first application program stored in a first memory area of a computing device; transmitting an authentication request to a second application program stored in a trusted execution environment of the computing device separate from the first memory area; displaying a prompt for authentication data based on an instruction supplied by the second application program; receiving authentication data; transmitting the received authentication data to an external computing device; receiving, by the second application program of the computing device, an authentication result from the external computing device; and transmitting, by the second application program of the computing device, the authentication result to the first application program in response to the authentication request.