Well, to get started you could buy one of these: https://www.reiner-sct.com/en/produkt/reiner-sct-authenticator/ https://www.reiner-sct.com/en/produkt/reiner-s

Well, to get started you could buy one of these: https://www.reiner-sct.com/en/produkt/reiner-sct-authenticator/ https://www.reiner-sct.com/en/produkt/reiner-sct-authenticat... … and then decide whether you really want to get into electronics development.