olemus
pildi taasesitus
biomeetrilise autentimise mehhanismi petmiseks

täpsemalt
https://www.cybertraining365.com/cybertraining/Topics/Image_replay_attack

näiteid
https://mobidev.biz/blog/face-anti-spoofing-prevent-fake-biometric-detection

https://project.inria.fr/wifs2017/files/2017/12/tutorial-biometric-spoofing-WIFS-2017-part2-reduce.pdf