[iso1631]

The quoted passwords are md5 sums of paypalformyusername and googleformyusername

Easy to remember, and you'd have to be very determined to get the link between them even if both were compromised, but if the plain text version was compromised then it would compromise the entire system

That's the most secure system I can think of which doesn't involve remembering thousands of complex random passwords. Sure I can remember "correcthorsebatterystaple", but can I remember which 4 words for which specific site?