### Requesting a Callsign Certificate: Specifying a Passphrase

If you're using a shared computer, you should protect your Callsign Certificate by specifying the same passphrase in both textboxes; you'll be asked to provide this passphrase each time you direct TQSL to digitally sign a log file, so be sure to remember it. If you control access to the computer you're using, you can leave both textboxes empty, thereby avoiding the need to provide a passphrase each time you direct TQSL to digitally sign a log file.