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<p>protocols often use one or more underlying <a href="page.php?w=key_agreement">key agreement method</a>s, which are also sometimes themselves referred to as "cryptographic protocols". For instance, TLS employs what is known as the <a href="page.php?w=Diffie-Hellman_key_exchange">Diffie-Hellman key exchange</a>, which although it is only a part of TLS per se, Diffie-Hellman may be seen as a complete cryptographic protocol in itself for other applications.</p>

<p><big> Advanced cryptographic protocols </big></p>
<p>A wide variety of cryptographic protocols</p><p>
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