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, Triple-DES, RSA, ECC, SHA and MD5 algorithms and the generation of random numbers through high-speed hardware calculation by the Trusted Secure IP modules. 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 for RE Family V.1.01 has been released. Support for RE01_256KB Group started.

The Trusted Secure IP Driver for RX Family V.1.11 has been released. Support for AES Key Wrap function on TSIP-Lite started.

Release Information

Target Device Note1 Product Name Version/Release Providing Method
RX65N, RX651
Trusted Secure IP Driver for RX Family (Source code version) Note2 Latest Ver.: V1.11 Release 00
Released: Oct. 20, 2020
Contact us
Trusted Secure IP Driver for RX Family (Binary version) Note2 Latest Ver.: V1.09 Release 00
Released: Jul. 10, 2020
RE01 Trusted Secure IP Driver for RE Family Latest Ver.: V1.01 Release 00
Released: Jul. 20, 2020
Contact us
RZ/A2M Trusted Secure IP Driver for RZ Family RZ/A2M Group Latest Ver.: V3.00
Released: Jun. 30, 2020
Contact us


  1. Some MCUs in the listed groups do not include a TSIP module. Refer to the User's Manual: Hardware for the given group to check the type names of the MCUs that have a TSIP module.
  2. Please use the binary version when considering the prototype. In this case, please download.
    Please use the source code version when considering the mass production. In this case, please contact us. Users cannot change cryptographic functions.

Operating Environment


  • 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, RE MCUs or RZ MPUs


  • 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 or UART.


Function Algorithm (mode/method) TSIP-Lite TSIP
RX23W, RX231, RX66T, RX72T,
RX65N, RX651, RX66N,
RX72M, RX72N
Public-Key Cryptography Signature generation and verification RSA (RSASSA-PKCS1-v1_5)
Encrypt/Decrypt RSA (RSAES-PKCS1-v1_5)
Key pair generation RSA 1024/2048 bit
(2048 bit only)
ECC P-192/224/256/384
Symmetric-Key Cryptography AES-128/256 bit (ECB/CBC/GCM/CCM)
Triple-DES 56/56x2/56x3 bit (ECB/CBC)
ARC4 2048 bit
Message authentication AES-128/256 bit (CMAC)
Hash function SHA-1, SHA-224, SHA-256
(SHA-1, SHA-256)

(SHA-224, SHA-256)
Random number generation -
Key management function AES 128/256 bit
RSA 1024/2048 bit
(2048 bit only)
ECC P-192/224/256/384
Triple-DES 56/56x2/56x3 bit
ARC4 2048 bit
Key update function AES 128/256 bit In Development
RSA 1024/2048 bit In Development
ECC P-192/224/256/384
Triple-DES 56/56x2/56x3 bit
ARC4 2048 bit
SSL/TLS cooperation function TLS1.2 compliant
Supporting cipher suites:

Key agreement ECDH 512 bit, DH 2048 bit
Key Wrap AES 128 bit/256 bit
Secure booting -
Secure updating of firmware - In Development

 Available | — Unavailable

Maximum key length for each algorithm.

  • - AES: 256 bit
  • - RSA: 2048 bit
  • - DES: 56 bit
  • - Triple-DES: 168 bit
  • - ARC4: 2048 bit
  • - DH: 2048 bit
  • - ECDH: 512 bit
  • - ECDSA: 256 bit
  • - DSA 2048 bit / ECDSA 512 bit (Cryptographic algorithm for authentication): Not supported

Operating Environment

MCU RX Family RE Family RZ Family
IDE CS+ V8.02.00 or later
e2 studio 2020-07
IAR Embedded Workbench for Renesas RX 4.14.01 later
IAR Embedded Workbench
for ARM version 8.32.1 or later
e2 studio V.7 or later e2 studio V.7.6.0
C Compiler C/C++ Compiler Package for RX Family V3.02.00 or later IAR C/C++ Compiler
for ARM version 8.32.1 or later
GCC ARM Embedded
GCC ARM Embedded Toolchain
Debugger E1 emulator
E20 emulator
E2 emulator Lite
IAR I-jet
Segger JLink
Segger JLink Segger JLink
Evaluation board RZ/A2M Evaluation Board Kit
(Contact us about details)
Evaluation board (optional) Note Wireless LAN expansion board package for RSK (includes Wireless LAN module (eWBC))(Part Number: RTK0ZZZZZZP00000BR)

Note: 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.

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