How Many Passwords Can a Computer Process Every Second?
This is equal to the length of a piece of string (sic) … The answer depends, at least, on the computer and the program testing the passwords. It is less than the clock speed of the processor. Ian Goldberg of Berkeley cracked the 40 bit RSA code using 250 computers checking at 100 billion key combinations an hour (in 1997). I assume that 100 billion means 100×109. At the moment, pcs may run at about 109 hertz or at megahertz, but this is based on clock rates of the processor, which do not really relate clearly to the speed at which the computer can process information. This figure means that the clock speeds of a modern computer is 3,600 x 109 cycles per hour, which seems faster than the 250 computers in 1997. At the moment, 2010, the fastest computer for general scientific use is BlueGene/L which computes at 478.2 trillion floating operations per second (FLOPS), or 4.782 x 1014 FLOPS. So in about 13 years, a single computer dwarfs a network of 250 computers in 1997! Regular computers
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