Following Apple's Face ID launch this is one of those hot topics at the moment. This technology is not without its sceptics and questions still remain whether it can become full proof. In today's world, that is a big ask.
I have collected some bits and pieces worth reading.
Apple's September 2017 paper on face ID and security - [https://images.apple.com/business/docs/FaceID_Security_Guide.pdf]
Kairos produce a useful comparison chart of facial recognition services[https://www.kairos.com/blog/face-recognition-kairos-vs-microsoft-vs-google-vs-amazon-vs-opencv]
The Guardian Newspaper published an article of Samsung's flawed Iris scanner - [https://www.theguardian.com/technology/2017/may/23/samsung-galaxy-s8-iris-scanner-german-hackers-biometric-security]
New research proposal just out 'Bypassing 3D Facial Recognition Authentication on Mobile Devices' - [https://www.os3.nl/_media/2017-2018/courses/ssn/projects/ssn_proposal_01.pdf]