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Trusted Secure IP Driver

This driver controls AES, AES-GCM, AES-CMAC encryption and decryption and the generation of random numbers through high-speed hardware calculation by the Trusted Secure IP modules of RX231 MCUs thus equipped.

It also helps in the safe management of user keys by the Trusted Secure IP module.

These functions allow secure updating of flash ROM embedded in MCUs and in preventing illicit firmware being booted up (secure booting).

As a result, this driver can help you to protect “Internet-of-Things” (IoT) embedded devices from viral infections and eavesdropping.

Release Information

Target Device Product Name Status Version/Release
RX231 Group *1 Trusted Secure IP Driver for RX231 Group Available

Latest Ver.: V.1.01 Release 00

Released: Jun 27, 2016

*1 Refer to the RX231 Group User’s Manual: Hardware for the type names of products that include a TSIP module.


  • Cryptographic functions which provide advanced security can be embedded in mass-produced products at low cost
  • High-speed execution of the AES, a world standard cryptographic algorithm
  • Support for AES-GCM, which is frequently included in the required specifications of smart meters
  • Functions for safely updating firmware
  • Easily combined with other device drivers for RX MCUs

Application example

  • Cryptographic communications among CPUs in equipment at sites or within equipment
  • Secure updating of firmware for embedded devices in general

Corresponding function

Target Device Corresponding function
RX231 Group AES (128- or 256-bit keys, ECB or CBC mode), AES-GCM, AES-CMAC, and random number generation, Management of AES keys, secure updating of firmware, secure booting



  • Trusted Secure IP Driver main body
  • Trusted Secure IP Driver manual
  • Sample code demonstrating application of the Trusted Secure IP Driver
    (1)Sample code for confirming the way user keys are written
    (2)Sample code for confirming the secure updating of firmware from USB memory.

Operating Environment

*3 This board is required to check the operation of sample code for checking the secure updating of firmware via wireless LAN.

How to Apply

We will provide the product to customers who will be adopting or plan to adopt a Renesas microcontroller of the RX231 group. When ordering, please contact your local Renesas Electronics sale officer or distributor.

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