It should be either 32 or 64 characters long as only 128 bit and 256 bit key are supported.</p>
<p>#define XPUF_RED_KEY_LEN (XPUF_RED_KEY_SIZE_256) (or) (XPUF_RED_KEY_SIZE_128) XPUF_RED_KEY_LEN can be configured as one of the two provided options. This configuration should be done on the basis of the length of the red key in bits. Only 128 bit and 256 bit key are supported. By default the length of red key is configured as 256 bit.</p>
<p>(III) GENERATE UDS PRIME</p>
<p>#define XPUF_ENCRYPT_UDS (FALSE) This