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 Group, RX65N, RX651 Group, RX66T Group and RX72T Group 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.


The Trusted Secure IP Driver V.1.07 has been released. RX72T group has been supported.

Release Information

Target Device 1 Product Name Status Version/Release
RX231 Group
RX65N, RX651 Group
RX66T Group
RX72T Group
Trusted Secure IP Driver for RX Family
Available Latest Ver.: V1.07 Release 00
Released: Feb 28, 2019
  1. Refer to the each MCU User's Manual: Hardware for the type names of product that include a TSIP module.

Operating Environment

Obtaining the product


  • 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


  • 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.


Target Device Function
RX231 Group
RX66T Group
RX72T 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
RX65N, RX651 Group In addition to the above functions supported for products of the RX231 group, this driver handle DES,2key-TDES,Triple-DES, SHA1, SHA256, MD5, RSA(with RSASSA-PKCS1-v1_5 signature generation and verification, RSAES-PKCS1-v1_5 encrypt/decrypt up to 2048-bit), the key management of RSA key and SSL/TLS cooperation function, RSA Key generation function (RSA 1024 bit, 2048 bit), Key update function


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

Obtaining the product

We will provide the product to customers who will be adopting or plan to adopt a Renesas microcontroller. Please contact your local Renesas Electronics sales office or distributor.

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