When a user registers from scratch (not importing an old key or the previous key being revoked or invalid), the server should delete all user information as well as the whole roster. Otherwise new users using an old number could see the roster list of the old number owner.
When a user registers from scratch (not importing an old key or the previous key being revoked or invalid), the server should delete all user information as well as the whole roster. Otherwise new users using an old number could see the roster list of the old number owner.