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<p>Returns 8 random bytes. </p>
<p><em>The current AVR implementation does not produce real random numbers, but pseudo random numbers. These are produced by a X9.17 generator modified to use a counter instead of a timer. The state of this PRNG is held at RAND_STATE_ADDR. The start value (at least the key) at this address should be unique for every card.</em></p>
<dl><dt><b>Parameters:</b></dt><dd>
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