Comment Bank security compromised? (Score 1) 114
El Reg a few years back had a story that in the nineties, one of the big four banks in the UK had its security team compromised. New cards had a PIN set from only one of three choices. That meant that anyone intercepting a card who knew the three could go haywire with the account. The customer wouldn't know and the bank couldn't explain it.
Could have been cock and bull, but it's a possible small source of non-randomness.