A cryptographic accelerator module will use hardware support to speed up some cryptographic functions on systems which have the chip. Do not enable this option if you have a Hifn cryptographic acceleration card, as this will take precedence and the Hifn card will not be used. Acceleration should be automatic for IPsec when using a cipher supported by your chip, such as AES-128.If you do not have a crypto chip in your system, this option will have no effect. To unload the selected module, set this option to 'none' and then reboot.