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<!--
SPDX-FileCopyrightText: 2007 - 2008, Nicolas François
SPDX-License-Identifier: BSD-3-Clause
-->
<varlistentry condition="yescrypt">
<term><option>YESCRYPT_COST_FACTOR</option> (number)</term>
<listitem>
<para>
When <option>ENCRYPT_METHOD</option> is set to
<replaceable>YESCRYPT</replaceable>, this defines the cost factor
used by the encryption algorithm by default (when the cost factor
is not specified on the command line).
</para>
<para>
With a high cost factor, it is more difficult to brute force the
password. But note also that more CPU resources will be needed to
authenticate users.
</para>
<para>
The value must be inside the 1-11 range.
</para>
<para condition="pam">
Note: This only affect the generation of group passwords.
The generation of user passwords is done by PAM and subject to the
PAM configuration. It is recommended to set this variable
consistently with the PAM configuration.
</para>
</listitem>
</varlistentry>
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