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Apart from all the answers which explain the difference, I have an example which may help you get the thing they want to say. Consider a coin toss, you either get a H or a T. If the coin toss is random, it is highly likely that out of 1000 coin tosses, 500 would be H and it is quite unlikely that 999 out of them would be H. But if the coin toss is non-...


The low bits of a linear congruential generator are notoriously weak. Try to use only the higher order bits. Normally this is done by bit operations, but you can discard the bottom $b$ bits by dividing by $2^b$ and rounding down.


There's really no way to do this. First, the website generating the password would need to be open source, or at least publish what algorithm they use. Supposing they do that, then we would need to know the "inputs" to the algorithm. That would depend on their source of randomness: it might be the microsecond that your query was submitted, or it might be ...

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