To provide a printing system using encryption, further improved in security.

In this printing system 1, a display operation part 2 sets a user name, a fingerprint reader 4 acquires fingerprint data of a user, and a control part 5 generates an encryption key from the fingerprint data, stores the encryption key and the user name in association with each other, in a non-volatile memory 9. Thereby, when job data including the user name and print data are inputted through an input interface, the user name of the job data is retrieved from the non-volatile memory 9 by the control part 5, the encryption key corresponding to the user name is acquired, and is set to an encryption chip 6, the print data are encrypted and are stored in an HDD 7, and the encrypted print data are decrypted on the basis of a decryption key thereof (= the encryption key) and are printed.