Realistically, browsers aren't going to implement this, whether it's a good idea or not. But I could see this working for websites in the lowest tier of securi

Realistically, browsers aren't going to implement this, whether it's a good idea or not. But I could see this working for websites in the lowest tier of security (like HN). Set a cookie for a year, and if you lose it or move to a different computer, receive a secret link via mail.