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  158. <section id="cryptographic-services">
  159. <span id="crypto"></span><h1>Cryptographic Services<a class="headerlink" href="#cryptographic-services" title="Link to this heading">¶</a></h1>
  160. <p id="index-0">The modules described in this chapter implement various algorithms of a
  161. cryptographic nature. They are available at the discretion of the installation.
  162. On Unix systems, the <a class="reference internal" href="crypt.html#module-crypt" title="crypt: The crypt() function used to check Unix passwords. (deprecated) (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">crypt</span></code></a> module may also be available.
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  168. <li class="toctree-l2"><a class="reference internal" href="hashlib.html#usage">Usage</a></li>
  169. <li class="toctree-l2"><a class="reference internal" href="hashlib.html#constructors">Constructors</a></li>
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  172. <li class="toctree-l2"><a class="reference internal" href="hashlib.html#shake-variable-length-digests">SHAKE variable length digests</a></li>
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  180. <li class="toctree-l4"><a class="reference internal" href="hashlib.html#using-different-digest-sizes">Using different digest sizes</a></li>
  181. <li class="toctree-l4"><a class="reference internal" href="hashlib.html#keyed-hashing">Keyed hashing</a></li>
  182. <li class="toctree-l4"><a class="reference internal" href="hashlib.html#randomized-hashing">Randomized hashing</a></li>
  183. <li class="toctree-l4"><a class="reference internal" href="hashlib.html#personalization">Personalization</a></li>
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  193. <li class="toctree-l1"><a class="reference internal" href="secrets.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">secrets</span></code> — Generate secure random numbers for managing secrets</a><ul>
  194. <li class="toctree-l2"><a class="reference internal" href="secrets.html#random-numbers">Random numbers</a></li>
  195. <li class="toctree-l2"><a class="reference internal" href="secrets.html#generating-tokens">Generating tokens</a><ul>
  196. <li class="toctree-l3"><a class="reference internal" href="secrets.html#how-many-bytes-should-tokens-use">How many bytes should tokens use?</a></li>
  197. </ul>
  198. </li>
  199. <li class="toctree-l2"><a class="reference internal" href="secrets.html#other-functions">Other functions</a></li>
  200. <li class="toctree-l2"><a class="reference internal" href="secrets.html#recipes-and-best-practices">Recipes and best practices</a></li>
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