This entire subject is so ridiculous. The US military has solved this problem almost as much as 15 years ago. No visible scribbles of any kind, just cryptogra

This entire subject is so ridiculous. The US military has solved this problem almost as much as 15 years ago. No visible scribbles of any kind, just cryptographic signatures backed by certificate. The certificate is embedded on a photo ID hardware token that requires a PIN that locks after 3 failed attempts. The military uses digital signatures for everything.