# 设置用户密码（设置一个安全的密码）
// = "United States"
，这一点在旺商聊官方下载中也有详细论述
We’ve argued that the zero-knowledge paradigm has two advantages over simple Chaumian credentials. First, it’s potentially much more expressive. Second, it allows a User to re-use a single credential many times without needing to constantly retrieve new single-use credentials from the Issuer. While that’s very convenient, it raises a concern we already discussed: what happens if a hacker steals one of these re-usable credentials?
Hit the Start Scanning button
Thanks for signing up!