In recent years, large-scale Internet services have been repeatedly invaded by hackers, and even directly dragged to the database. Whether it is 12306 in China, or hotel, online disk data, or Dropbox in foreign countries, account information has been suspected of being traded on the Internet, and new information about stealing users' personal data has emerged endlessly. If you are not careful, it may be hundreds of thousands, Even millions of user data, including account names E-mail 、 Passwords, credit card data, etc. Although most services process user passwords in an encrypted way, if the password combination is too simple
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