Cryptography Reference
In-Depth Information
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A word that was correct at the beginning (THETA is indeed a Greek letter)
turned out to be wrong. Likewise, a correction made during the second
step (SHAPE) turned out to be wrong. So the intermediate results must
be considered with some caution and we must avoid any hasty decisions.
In modern iterative decoders, this caution is measured by a probability
that is never exactly 0 or 1.
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