This product enables secure updating of flash ROM embedded in MCUs and in preventing illicit firmware being booted up (secure booting). 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 RX Family thus equipped. As a result, this driver can help you to protect "Internet-of-Things" (IoT) embedded devices from viral infections and eavesdropping. Trusted Secure IP includes a full-function version "TSIP" and limited function version "TSIP-Lite".


The Trusted Secure IP Driver V.1.08 has been released. The support for the RX72M group started. The Elliptic Curve Cryptography function is now available.

Release Information

Target Device 1 Product Name Status Version/Release
RX65N, RX651
Trusted Secure IP Driver for RX Family
Available Latest Ver.: V1.08 Release 00
Released: Sep 30, 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.


Function Algorithm (mode/method) TSIP-Lite
(RX231, RX66T, RX72T)
(RX65N, RX651, RX72M)
Public-Key Cryptography Signature generation and verification RSA (RSASSA-PKCS1-v1_5)
Encrypt/Decrypt RSA (RSAES-PKCS1-v1_5)
Key pair generation RSA 1024/2048bit
ECC P-192/224/256
Symmetric-Key Cryptography AES-128/256 bit (ECB/CBC/GCM)
Triple-DES 56/56x2/56x3 bit (ECB/CBC)
Message authentication AES-128/256 bit (CMAC)
Hash function SHA-1, SHA-256
Random number generation -
Key management function AES 128/256 bit
RSA 1024/2048 bit
ECC P192/224/256
Triple-DES 56/56x2/56x3 bit
Key update function AES 128/256 bit
RSA 1024/2048 bit
ECC P192/224/256
Triple-DES 56/56x2/56x3 bit
SSL/TLS cooperation function TLS1.2 compliant
Supporting cipher suites:
Secure booting, Secure updating of firmware -

 Available | — Unavailable

Operating Environment

IDE CS+ V8.02.00 or later
e2 studio V7.5.0 or later
C Compiler C/C++ Compiler Package for RX Family V3.00.00 or later
Debugger E1 emulator
E20 emulator
E2 emulator Lite
Evaluation board Renesas Starter Kit for RX231 (B Mask: built-in Trusted Secure IP)
Renesas Starter Kit+ for RX65N-2MB (Built-in Trusted Sesure IP)
Renesas Starter Kit for RX66T (Built-in Trusted Sesure IP)
Renesas Starter Kit for RX72M (Built-in Trusted Secure IP)
Renesas Starter Kit for RX72T (Built-in Trusted Secure IP)
Evaluation board (optional) 2 Wireless LAN expansion board package for RSK (includes Wireless LAN module (eWBC))(Part Number: RTK0ZZZZZZP00000BR)

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


  • 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.

Target Devices

Family Group
RX Family

Information supporting development tools

Title Description
My Renesas Create a My Renesas account to use our tool download services,
receive e-newsletter/update notifications, and take advantage of our other services.
e-learning Information for studying and learning about microcontrollers and microprocessors.
FAQ Frequently asked questions and useful hints for development.
Forum A forum and community site to share technical information,
questions and opinions with others who use Renesas MCU's.
Tool News Tool release information and other important information.
Operating Environment Information on system requirements and operating environment for the latest version of tools.
Info on Discontinued Products A list of Renesas software and tools that have been discontinued and
are no longer being offered for new projects.