If you are already logged in to an account with Dragon running, will it let you dictate into system password boxes (OS X Dictation does not when I tried it)? If so, having the computer auto-login on boot to a secondary account should accomplish what you need. Then dictate your password into the Fast user switching box.
Otherwise, user switching can also be activated with Automator or Terminal. OS X Dictation will type into a password prompt in Terminal, so a script might be able to switch to your account with password dictation (or with your password stored in the script, if you trust that).
When done in your secure account, just run another script or reboot to switch back to the secondary account.
This is an excellent idea and something I'm going to implement immediately! It will certainly give me a level of security whilst I look at some hardware solutions, thanks :-)
Otherwise, user switching can also be activated with Automator or Terminal. OS X Dictation will type into a password prompt in Terminal, so a script might be able to switch to your account with password dictation (or with your password stored in the script, if you trust that).
When done in your secure account, just run another script or reboot to switch back to the secondary account.
Here are some example scripts: http://hints.macworld.com/article.php?story=2011081307461141...