Face ID iPhone X 'hack' demoed live with mask by Bkav
A Vietnamese cyber-security firm has shown the BBC how a mask can be used to unlock Apple's new iPhone X.
The demo took place about a week after Bkav first claimed to have undermined the handset's security.
But other experts have cast doubt on what the "hack" amounts to.
Apple has not commented beyond referring the public to documents it had already published about its security system.