Security issues II.

Every day we can read about computer related crimes or crimes committed using computers. Frauds are the most attractive because amount of non-cash transactions could be very high (try to write down on paper digits representing an amount of one hundred - it's "1" + "0" + "0" - and then change it to one thousand - you should only add a "0" - it is very easy contrary to adding cash ;-) ).
Many of these crimes are committed by stealing passwords - this is very old method already used by picklocks (or safebreakers or safecrackers). They knew that many users of very reliable safes couldn't remember password (or were lazy to remeber it :-) ) and wrote it down and the paper laid to the memorable place. Secretaries placed it under desk pad, in the current time they stick it under keyboard or similar place. It is the same as to write your PIN code on your credit card - very memorable place, but for all people who will deal with card.
Why am I writing about this old bad practice?
Because there are many methods and tools for securing any kind of property - for example safes :-) - that are sufficient in most cases, but people annihilate their safeness by theirs bad habits.
And it applies also for computers and computer supported technologies. People are the weakest link.