Where did you get that NSD btw?
nostr:nprofile1qqsq37tg2603tu0cqdrxs30e2n5t8p87uenf4fvfepdcvr7nllje5zgpremhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet59uq3qamnwvaz7tmwdaehgu3wd4hk6tcpz4mhxue69uhhyetvv9ujumn0wd68ytnzvuhs4hx9pe was playing with it: nostr:note1qkz797wg2dyer8ucga6rtm9wnnpnqgyc6lht2lfyn26xkhuqgcps3hh38f
ohhh. Well whatever that cost plus $20 and it could be doable, I think. A patchwork with @cypherpruk's NSD and one of these from Amazon should do it: https://www.amazon.co.uk/usb-fingerprint-reader/s?k=usb+fingerprint+reader