Converting clear information into secret information is called encryption, and converting secret information into clear information is called decryption. Which of the following are encrypted:. ['At the faculty meeting, the person in charge of the Science and Technology Department said to everyone, "Your e-mail password is 2004. ".', 'Xiao Li agreed with her lover that whoever goes out must close the doors and windows, especially the security door.', 'iaozhu said to Xiao Li, "After I climbed to the top of the mountain, if I waved a magazine in my left hand, it means that the wind is very strong, so you should not go up. ".', "Xiao Zhang's computer is often opened randomly by people. Recently, a large number of viruses were found. To prevent the loss of files, Xiao Zhang re-set up his computer and locked it with Chinese and English letters and numbers."]