he SystemClock_Config() function is used to configure the system clock for STM32H573IIKxQ Devices :</p>
<ul>
<li>The CPU at 250 MHz.</li>
</ul>
<p>The AES-GCM mode requires:</p>
<ol type="1">
<li>Plain text which will be authenticated and encrypted. Its size must be a multiple of 16 bytes. So if the original plain text size is not a multiple of 16 bytes, it must be padded.</li>
<li>Header that will be authenticated but not encrypted. The header size must be multiple of 16 bytes whatever the key size.</li>
<