- The lock can work with 2 types of passwords - preset passwords and generated passwords. Preset passwords are passwords that are set via administrator's smartphone menu only when there is Bluetooth connection with the lock. These passwords may contain from 4 to 8 digits, are tied to a specific user and are set by the administrator (for example, the password for the user "Kate" may be. 1234# and for "Sara" - 2580#) Generated passwords are passwords that are generated remotely without any connection to the lock! All generated passwords contain 6-8 digits. Into these digits, using a secret encryption algorithm, the TTLOCK software encrypts the action sequence for each particular lock belonging to the administrator. Thus, you can generate a password for the lock "OFFICE" which will work from 10.00 on November 1 till 18.30 on November 4, and then will cease to exist.