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?>
<div id="function.sodium-crypto-auth" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">sodium_crypto_auth</h1>
  <p class="verinfo">(PHP 7 &gt;= 7.2.0, PHP 8)</p><p class="refpurpose"><span class="refname">sodium_crypto_auth</span> &mdash; <span class="dc-title">Compute a tag for the message</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.sodium-crypto-auth-description">
  <h3 class="title">Descrizione</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>sodium_crypto_auth</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.string.php" class="type string">string</a></span> <code class="parameter">$message</code></span>, <span class="methodparam"><span class="attribute"><a href="class.sensitiveparameter.php">#[\SensitiveParameter]</a> </span><span class="type"><a href="language.types.string.php" class="type string">string</a></span> <code class="parameter">$key</code></span>): <span class="type"><a href="language.types.string.php" class="type string">string</a></span></div>

  <p class="simpara">
   Symmetric message authentication via <span class="function"><strong>sodium_crypto_auth()</strong></span> provides
   integrity, but not confidentiality.
  </p>
  <p class="simpara">
   Unlike with digital signatures (e.g. <span class="function"><a href="function.sodium-crypto-sign-detached.php" class="function">sodium_crypto_sign_detached()</a></span>),
   any party capable of verifying a message is also capable of authenticating
   their own messages. (Hence, symmetric authentication.)
  </p>

 </div>


 <div class="refsect1 parameters" id="refsect1-function.sodium-crypto-auth-parameters">
  <h3 class="title">Elenco dei parametri</h3>
  <dl>
   
    <dt><code class="parameter">message</code></dt>
    <dd>
     <span class="simpara">
      The message you intend to authenticate
     </span>
    </dd>
   
   
    <dt><code class="parameter">key</code></dt>
    <dd>
     <span class="simpara">
      Authentication key
     </span>
    </dd>
   
  </dl>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.sodium-crypto-auth-returnvalues">
  <h3 class="title">Valori restituiti</h3>
  <p class="simpara">
   Authentication tag
  </p>
 </div>



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