# Arm CryptoCell-312 Security IP

The RSL15 system includes the Arm CryptoCell-312 IP, which is used to maintain security of the device, allow secure operation of the application firmware, and permit related user applications to access security features.

IMPORTANT: The CC312 functions are not reentrant. These functions cannot be called again until their execution has been completed.

A significant part of the Arm CryptoCell-312’s operation is based on the use of the Mbed TLS libraries.

For more information about this topic, see: