Anyone with a long jumbled password will have to write it down
somewhere; and there's the leaky cauldron!
Now then, where does Jimbo always look before logging into .....?
Ed, on the other hand, carries his in his head. And that marvellous
combination of dendrites & synaptic gaps that the human cerebellum uses
is far superior to even AES 256 encryption, which will be open to brute
force attempts.
And the human brain is not (c.f. the aforementioned rubber hose
decryption)?
But no, you are quite correct, the best place is in the brain but, as I
was implying, the trade off is between what you can memorise and the
safety of a key. AES 256 has not yet been, nor is ever likely to be,
broken, but the key can be prised out of you. In the UK we have yet
another factor - our outrageous Laws mean that you can be compelled to
hand over any password to the Police anyway - someone who refused was
recently jailed for four months.
I have 160 log-ins memorised in Roboform. At the height of my mental
powers (some considerable number of years ago) I could not have
remembered 160 log-ins and passwords, especially as they are sometimes
not used for a long time.
We also need to remember what we are trying to protect, and from whom.
1) There is zero chance of any normal (i.e. not with Bill Gates' money)
individual being the subject of burglary with the specific intent of
obtaining their passwords - it wouldn't be worth it.
2) The burglar has to have access to more computing power than the world
has in toto to crack AES - if so he has a lot more money than his victim
and, again, why would he bother.
3) If you realised you had been burgled, you would immediately change
all your passwords - so the burgled ones would be no use to him anyway.
No, what we are trying to protect against is the casual, chance,
observation of someone who has access to the same computer being able to
read your passwords - or perhaps the illicit interception of your data
whilst you are using them. Again, as you say, if Jimbo writes down his
password somewhere he's asking for it. If Ed carries it in his head, he
can be overseen typing it into his computer, or it can be picked up by a
keylogger. It all boils down to common sense care - not leading edge
cryptography. As such, Roboform is not only secure, it is overkill.