Rich,
A summary of supported Crypto feature can be found in the Section 11 of the SSP Datasheet (R01DS0272EU0111).
Here is the link: synergygallery.renesas.com/.../r01ds0272eu0111_synergy_ssp.pdf
A more detailed description of the Crypto Interface can be found in the Section 4.2.6 of the SSP User Manual (R01US0171EU0094). The link is: synergygallery.renesas.com/.../r01us0171eu0094_synergy_ssp.pdf
Thanks,
Fatih