CAU        C
MD5 (KBs)      10964      5471
SHA256(KBs)     3322      2165
AES set key(us)    3        25      128-bit key
AES CBC (us)      11       189       64 bytes

The K64F has a crypto-acceleration unit (CAU) that can speedup software DES/AES/SHA/MD5. Freescale has an assembler wrapper at [[http://www.freescale.com/products/arm-processors/kinetis-cortex-m/k-series/k7x-glcd-mcus/crypto-acceleration-unit-cau-and-mmcau-software-library:CAUAP]] The CAU speeds the time-critical crypto operations, and the library only accesses those basic operations, so you still need to add logic for padding hash input and doing CBC encryption. The Freescale library is in GNU C/assembler so it doesn't work with MBED on-line compiler. I exported the GNU GCC MBED build environment to test the CAU library on K64F @ 120MHz. Here are some preliminary results comparing CAU with C implementation: <<code>> CAU C MD5 (KBs) 10964 5471 SHA256(KBs) 3322 2165 AES set key(us) 3 25 128-bit key AES CBC (us) 11 189 64 bytes <</code>> Has anyone ported the CAU library to work with the MBED on-line compiler?

oooh! this is something I might like to see working in mbed. have you had a chance to make any progress with this yourself?

Is there any follow-up to this post? I'm struggling to use the on board encryption.