While this also seems to use surface attributes of the palm, here’s an interesting talk about bypassing vein detection: <a href="https://media.ccc.de/v/35c3-9545-venenerkennung_hacken#l=eng&t=2" rel="nofollow">https://media.ccc.de/v/35c3-9545-venenerkennung_hacken#l=eng...</a>