wolfSSL at Black Hat USA 2020 – Virtual Event!

wolfSSL is excited to participate as a sponsor for the first ever virtual Black Hat USA!!! Come visit wolfSSL at Black Hat USA August 1-6 in Pacific Daylight Time (UTC?07:00).

Register with the link to get your FREE Business Hall Pass:

Come and talk to one of our experts on TLS 1.3, embedded security, embedded SSL/TLS, Secure Boot, MQTT, SSH, TPM 2.0, curl + tiny-curl, FIPS, DO-178, MISRA and more. We’ve got the best-tested crypto on the market and the best security without sacrificing performance. Ask to see our benchmarks!

Stop by to hear more about the wolfSSL embedded SSL/TLS library, the wolfCrypt encryption engine, meet the wolfSSL team, and have all your crypto questions answered. We can’t wait to “see” you!

For more information about wolfSSL, our products, or future events, please contact facts@wolfssl.com.

More information about Black Hat USA 2020 can be found here: https://www.blackhat.com/us-20/

Azure Sphere partners with wolfSSL to provide premier client TLS support

Now, with the Azure Sphere OS 20.07 release, Microsoft has licensed and exposed a subset of wolfSSL, the first commercial implementation of TLS 1.3, for use on Azure Sphere devices. This strategic pairing allows software developers to create client TLS connections directly using the Azure Sphere SDK. Software developers no longer need to package their own TLS library for this purpose. Utilizing the best-tested, high-performance wolfSSL TLS support in Azure Sphere can save device memory space and programming effort, freeing developers to build new, cutting-edge IoT solutions.

Microsoft Azure Sphere and wolfSSL have been long-time partners, striving for the very best in security. The Azure Sphere OS has long used wolfSSL for TLS connections to Microsoft Azure services. Azure Sphere also uses wolfSSL’s versatile technology to enable secure interactions from developer apps to customer-owned services.

Partnerships with embedded security leaders like wolfSSL play an important role in Azure Sphere’s mission to empower every organization to connect, create, and deploy highly secured IoT devices. The unique Azure Sphere approach to security is based on years of vulnerability research, the findings of which Microsoft published in the seminal paper “Seven Properties of Highly Secure Devices.” These seven properties are the minimum requirement for any connected device to be considered highly secured. Azure Sphere implements all seven properties, providing a robust foundation for IoT devices. This level of consideration is not lost on an engineering team like wolfSSL’s, known for producing the best-tested crypto on the market and consistently supporting the latest developments in TLS protocol, like TLS 1.3.

Azure Sphere can be used with any customer cloud service, not just Microsoft’s own Azure. By providing a highly secured ecosystem, Microsoft and wolfSSL make security features more accessible and easier to use and can extend unmatched security to new frontiers in IoT where security has historically been sparse.

For information on how to use these wolfSSL APIs on Azure Sphere, please reference the Azure Sphere documentation on wolfSSL. We will be publishing a sample to go along with this, available at a later date. Check back here—we will update this post with the link to the sample once it is available.

If you have any questions, contact Microsoft at AzCommunity@microsoft.com or wolfSSL at facts@wolfSSL.com.

Renesas RX72N Envision Kit Supported!

We are exited to announce wolfSSL‘s support for the Renesas RX72N Envision Kit with TSIP v1.09. The RX72N MCU is the flagship model of RX series, using a 32-bit RX72N 240 MHz microcontroller. The board just entered the market this spring and wolfSSL can now support secure connections on it via TLS!

If you have an interest in using wolfSSL with this MCU or the RX72N Envision Kit, we encourage you to give it a try with one of our sample applications.

wolfSSL provides TLS source code, sample programs, and project files that make your evaluation quick and easy. Our wolfCrypt benchmark sample application shows the performance of cryptography operations accelerated by the H/W accelerator (TSIP) and allows for an easy comparison to software cryptography performance.

Sample Applications Provided

  1. Cryptography test
  2. Cryptography benchmark
  3. TLS Client
  4. TLS Sever
  5. Linux server application which can communicate with #3

Board and Environment Support

Board: Renesas RX72N Envision Kit (R5F572NNHxFB)
IDE: Renesas e2Studio v7.8.0
Compiler: CCRX Tool Chain V.3.02.00
TSIP: V.1.09


Here are the benchmark results gathered during testing, comparing algorithm performance with and without TSIP.

AlgorithmPerformance (TSIP accelerated)Performance (Software-only, no TSIP)Acceleration Ratio
Random Number Generation3.826MB/s831KB/sx4.6
SHA25634.54MB/s1.82MB/s x18.9
HMAC-SHA256 33.74MB/s1.81MB/sx18.6


wolfSSL package including this RX72N Envision Kit support, is available from the wolfssl repository on GitHub:


Unzip the package then refer to “wolfssl-master/IDE/Renesas/e2studio/RX72NEnvisionKit/README” for more details.

The README describes how to build and execute the sample programs.


For more information, please contact facts@wolfssl.com.


wolfSSL is implementing MIKEY-SAKKE!

MIKEY-SAKKE is a standard created by the UK government’s National Cyber Security Center (NCSC). MIKEY-SAKKE is a standard designed to enable secure, cross-platform multimedia communications. It is highly scalable, requiring no prior setup between users or distribution of user certificates. It is designed to be centrally-managed, giving a domain manager full control of the security of the system. But even so, it maintains high-availability, as calling does not require interaction with centralized architecture.

wolfSSL is a lightweight TLS/SSL library that is targeted for embedded devices and systems. It has support for the TLS 1.3 protocol, which is a secure protocol for transporting data between devices and across the Internet. In addition, wolfSSL uses the wolfCrypt encryption library to handle its data encryption.

Secure communications are needed across all governments. As a result governments create policies encouraging the development of security solutions. MIKEY-SAKKE is the answer to the security requirements from the UK government to specify secure, open and patent free cryptographic methods in order to empower private industry to provide UK government interoperable secure communication solutions. As a result many private and commercial organizations perceive a sizable advantage being MIKEY-SAKKE compliant.

If there are any specific questions about how wolfSSL integrates, please contact our team at facts@wolfssl.com. If there is a desire for wolfSSL to include other cybersecurity standards, please let the wolfSSL team know!

wolfSSL and Safety Critical RTOS

Are you a user of Deos? If so, you will be happy to know that wolfSSL supports the Deos Safety Critical RTOS for FAA Certifiable Avionics Applications and has added TLS client/server examples to the wolfSSL embedded SSL/TLS library for Deos!

Deos is an embedded RTOS used for safety-critical avionics applications on commercial and military aircraft. Certified to DO-178C DAL A, the time and space partitioned RTOS features deterministic real-time response and employs patented “slack scheduling” to deliver higher CPU utilization. DO-178C DAL A refers to a specification that is required for software to be used in aerospace software systems.

The Deos port in wolfSSL is activated by using the “WOLFSSL_DEOS” macro. For instructions on how to build and run the examples on your projects, please see the “/IDE/ECLIPSE/DEOS/README” file.

wolfSSL provides support for the latest and greatest version of the TLS protocol, TLS 1.3! Using the wolfSSL port with your device running Deos will allow your device to connect to the Internet in one of the most secure ways possible.

For more information, please contact facts@wolfssl.com.


wolfSSL supports new A12Z Bionic chip in Macs

Two weeks ago, Apple announced a transition from Intel-based Macs to their very own ‘world-class custom silicon’ chip. This marks a new era for Apple, as they further establish a common architecture throughout their product ecosystem, making it easy for developers to write, update and optimize applications.

Underlying this recent development is Apple’s Universal App Quick Start Program that includes the ‘limited use of a Developer Transition Kit (DTK), a Mac development system based on Apple’s A12Z Bionic System on a Chip (SoC)’ among other services like forums support, beta version of macOS Big Sur and Xcode 12.

So why is this important? 

wolfSSL is a direct partner with ARM, the architecture A12Z Bionic is based upon, and we fully support all the crypto extensions that are built into the new chip. We aim to have the first FIPS certificate for A12Z and will be pushing out benchmarks on the A12Z soon, so stay tuned!

For more information, please contact facts@wolfssl.com.

Additional Resources:
The most recent version of wolfSSL can be downloaded from our download page, here: https://www.wolfssl.com/download/
wolfSSL GitHub repository: https://github.com/wolfssl/wolfssl.git
Check out the latest addition of the wolfSSL ARM mbed-os Port of the wolfSSL embedded SSL/TLS library!

Fuzz Testing

All of the wolfSSL team prides themselves on offering the Best Tested SSL/TLS library on the market. wolfSSL is able to do so by conducting regular, diligent, and well-planned testing to maintain a robust and secure library. wolfSSL knows that it is impossible to test every single possible path through the software, but opts to practice an approach that is focused on lowering risk of failure. wolfSSL implements an extensive internal testing plan that not only uses automated testing but makes sure to test well-known use cases. A key process in wolfSSLs’ internal testing plan is Fuzz Testing.

What is Fuzz Testing?

Fuzz testing, also known as fuzzing, is an automated software testing technique that is conducted to reveal coding errors and security loopholes in softwares, networks, or operating systems. A fuzz test is a technique that is widely used to discover defects which otherwise would not be identified by merely using traditional functional testing methods. Fuzzing is a Black Box testing technique that bombards a library with invalid, unexpected, or random data (known as fuzz to the system) in an attempt to expose inputs that cause the system to crash, fail in unexpected ways, or leak memory. This allows wolfSSL to catch bugs that could turn into potential vulnerabilities before they are able to make it into a release!

Fuzzing at wolfSSL

wolfSSL firmly believes that if a TLS and cryptography provider does not do fuzz testing, they are extremely exposed. wolfSSL runs 7 fuzz testers internally, every night to insure the most secure library on the market. wolfSSL tests using several different software fuzzers, including an in-memory fuzzer, a network fuzzer, OSS-fuzz, libfuzzer, tlsfuzzer, and AFL.

As a testament to wolfSSLs’ commitment to security, highly respected external testers are utilized when possible, for example: Guido Vranken in Holland and Robert Horr of T-Systems in Germany (check out this post by Guido Vranken on Fuzzing for wolfSSL).

As stated in the wolfSSL 2019 Annual Report, wolfSSL is the best – tested cryptography on market, due to consistent implementation of additional fuzz testing resources from both internal and external sources.

For further details regarding the internal wolfSSL process of testing to ensure code quality and security, please reference this blog page.

If there are any specific questions about how wolfSSL tests, please contact our team at facts@wolfssl.com. If there is a desire for wolfSSL to include other SSL/TLS or crypto implementations in wolfSSL interop testing, please let the wolfSSL team know! Likewise, if users would like to include wolfSSL in their own test framework, wolfSSL would be happy to discuss!