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<a accesskey="3" href="page.php?w=Authenticated_encryption&amp;p=2">3.Next</a>
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<p><b>Authenticated encryption</b> (AE) is any <a href="page.php?w=encryption">encryption</a> scheme which simultaneously assures the data confidentiality (also known as privacy: the encrypted message is impossible to understand without the knowledge of a secret <a href="page.php?w=Key_%28cryptography%29">key</a>) and <a href="page.php?w=Message_authentication">authenticity</a> (in other words, it is unforgeable: the encrypted message includes an <a href="page.php?w=authentication_tag">authentication tag</a> that the sender can calculate only while</p><p>
<a accesskey="3" href="page.php?w=Authenticated_encryption&amp;p=2">3.Next</a>
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