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<p>Other methods that can be used include <a href="page.php?w=Password-authenticated_key_agreement">Password-authenticated key agreement</a> protocols etc.</p>

<p><big>Authentication using Public Key Cryptography</big></p>
<p><a href="page.php?w=Crypto_systems">Crypto systems</a> using <a href="page.php?w=asymmetric_key">asymmetric key</a> algorithms do not evade the problem either. That a public key can be known by all without compromising the security of an encryption algorithm (for some such algorithms, though not for all) is certainly useful, but does</p><p>
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