CryptoCape Hookup Guide
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jbdatko, 
CaseyTheRobot 
Installing the Cape Firmware
The CryptoCape is a registered BeagleBone cape whose firmware is included in the latest BeagleBone debian images. However, you may have to upgrade your image to retrieve the latest software. Perform the following command on your BeagleBone:
dmesg | grep CRYPTO
If you see something like this, then you have the firmware installed:
[ 0.717065] bone-capemgr bone_capemgr.9: slot #3: 'BB-BONE-CRYPTO,00A0,SparkFun,BB-BONE-CRYPTO'
[ 0.717766] bone-capemgr bone_capemgr.9: loader: before slot-3 BB-BONE-CRYPTO:00A0 (prio 0)
[ 0.717783] bone-capemgr bone_capemgr.9: loader: check slot-3 BB-BONE-CRYPTO:00A0 (prio 0)
[ 0.720127] bone-capemgr bone_capemgr.9: loader: after slot-3 BB-BONE-CRYPTO:00A0 (prio 0)
[ 0.720149] bone-capemgr bone_capemgr.9: slot #3: Requesting part number/version based 'BB-BONE-CRYPTO-00A0.dtbo
[ 0.720167] bone-capemgr bone_capemgr.9: slot #3: Requesting firmware 'BB-BONE-CRYPTO-00A0.dtbo' for board-name 'BB-BONE-CRYPTO', version '00A0'
[ 0.720196] bone-capemgr bone_capemgr.9: slot #3: dtbo 'BB-BONE-CRYPTO-00A0.dtbo' loaded; converting to live tree
[ 0.756311] bone-capemgr bone_capemgr.9: loader: done slot-3 BB-BONE-CRYPTO:00A0 (prio 0)
You still need to install tpm-tools to use the TPM.
If you don't see the CryptoCape in dmesg, perform the following:
sudo apt-get install tpm-tools
cd /opt/scripts/tools/
sudo ./update_kernel.sh
sudo reboot
If you don't have an /opt/scripts/tools directory, then you have a really old version of sofware on your Beagle and you need to upgrade. Download the latest image from the BeagleBoard.org site.