On initial use, there are no accounts registered in Invantive Authenticator. You can register accounts in three ways: - Drag and drop one or more files with a QR code picture such as `my-amazon-account-qr-code.png` into the blue area shown below. - Place one or more QR code pictures on the clipboard and select "Add from clipboard" or press <kbd>Ctrl</kbd>+<kbd>V</kbd> when the Authenticator window has focus. - Manually import an account by selecting the "Add" button and entering the specifications.  *Drag and drop QR code picture files for the TOTP accounts into the blue area* ## Manual Import The manual import of an account is achieved by entering all specifications of the account in the window shown when "Add" was selected:  *Manual import of a TOTP-account* The meaning of the fields is: - User name: description of the account. - Issuer: selected from the list of most common issuers or manually entered. - Secret key: provided by the issuer. The TOTP algorithm used has a number of parameters. Practically all issuers use the default values of these parameters as shown above. In unusual circumstances you will run into a TOTP algorithm using non-default values for the parameters. Deviating values can be entered: - Generation interval: specify an interval different from 30 seconds. - Password Length: length of generated password selected from alternative lengths. - Start of epoch: start of time measurement, such as January 1, 1970. - Algorithm: an algorithm, chosen from SHA1, SHA256 or SHA512. ## Mass Import Accounts The drag-and-drop functionality to import accounts works for hundreds of picture files in one action. Consultants and other parties typically have large amounts of QR codes they need to manage. The recommended approach to loading such existing sets of QR codes into Invantive Authenticator is to select all these files and drag-and-drop them somewhere into the blue area. All accounts will be added to the database.