Wilson,
Mike is right that Quintum TAC can generate a short-time-active temporary password for your Quintum based on what hex symbols appearing at your telnet prompt.
No matter how secure is the Quintum temporary password generation server, if you are good in disassembling, you can easily debug the firmware code of Quintum and find the subrouting responsible for calculating the temporary password 🙂
Another big mistake is to leave your SNMP community to public.