Therefore, you will see that there are more key. The chance that the intruder will be able to guess the key that corresponds to the number of keys will be even more difficult, respectively. The intruders in a trial and error with the keys using the key that has a different number, so hoping to find the correct key and can be used to decrypt the data. This trial and error process known as search Key or find the keys themselves. The theory says that the trial and error experiments with this average must be a key half of the key, all before the correct key is found.
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