A researcher in Vietnam has demonstrated how he apparently fooled Apple Inc.'s face recognition ID software on its new iPhone X using a mask made with a 3D printer, silicone and paper tape.

An announcement on Friday by Bkav, a Vietnamese cybersecurity firm, that it had cracked Apple's Face ID, and a subsequent video apparently showing an iPhone being unlocked when pointed at a mask, were greeted with some skepticism.

Ngo Tuan Anh, Bkav's vice president, gave Reuters several demonstrations, first unlocking the phone with his face and then by using the mask. It appeared to work each time.