So, what’s new at wolfSSL? Take a look below to check out the most recent news, or sign up to receive weekly email notifications containing the latest news from wolfSSL. wolfSSL also has a support-specific blog page dedicated to answering some of the more commonly received support questions.

wolfSSL+ with NTRU Cipher Suites

wolfSSL+ (pronounced plus) is now available. wolfSSL+ includes NTRU public key encryption. NTRU works well in mobile environments because of the reduced bit size needed to provide the same security as other public key systems. NTRU also isn’t vulnerable to quantum attacks. Several new cipher suites utilizing NTRU are available including AES-256, RC4, and HC-128. Please contact us if you have any questions.

wolfSSL library available for the mbed cloud compiler

For everyone out there prototyping on the cool mbed board (, we`ve recently published our wolfSSL TLS/SSL embedded library to their cloud compiler so that developers can easily add it to their project.  It`s available at .  We also have an example client you can try out at .  Now securing connections, even during a prototype, is easily and rapidly attainable.  Please send us any comments or questions.

yaSSL Embedded Web Server 0.2 is Now Available

The second release of the yaSSL Embedded Web Server is now available for download!  New features with this version include a source release, better documentation, examples, and new run-time options.  

Our Web Server is focused on being small, fast, and embeddable.  Features include CGI, SSI, IP restrictions, access and error log support, and SSL among others. The wolfSSL embedded SSL library can be used to secure ports with SSL, giving you a secure connection while maintaining small size and fast speed.  

On an embedded system you can expect to see the yaSSL Embedded Web Server with wolfSSL enabled to come in around 100kB total.  We offer commercial support, consulting, and licenses for use in a wide variety of projects.

If you have any questions, or would like to learn more about the yaSSL Embedded Web Server and how it can help your project, please contact

Great Article on the Challenges of Smart Utility Meters

Here’s a great article from EE Times on smart utility meter design. Two of the big challenges described in the article are ones that we’ve dealt with before with our current users in the utility space. Securing the meter, and getting updates to the device securely.

wolfSSL embedded SSL is a critical component for both design requirements. It’s not talked about in the article, but the yaSSL Embedded Web Server is also useful when the meter design calls for delivery of web pages from the meter for field service technicians. 

See the article here:

yaSSL is looking to Hire! is a growing company looking to add a top notch embedded systems software developer to our organization. We develop, market and sell the leading open source embedded SSL protocol implementation, wolfSSL. We are also the developers of the yaSSL Embedded Web Server. Our users are primarily building devices or applications that need security.

Operating environments of particular interest to us include Embedded Linux, VxWorks, QNX, ThreadX, micro-C, RL-ARM. Skill with the new mobile and embedded environments like Android and iOS is a plus.

Currently, we are seeking to add a master level C developer interested in a fun young company with tremendous upside.

Backgrounds that are useful to our team include networking, security, and hardware optimizations. Assembly experience is a plus. Experience with encryption software is a plus. RTOS experience is a plus.

To apply or discuss, please contact

yaSSL will be attending ESC Silicon Valley 2011

yaSSL will be attending ESC Silicon Valley 2011, the industry’s leading embedded systems event. ESC brings together the largest community of designers, technologists, business leaders, and suppliers all in one place.

ESC Silicon Valley will be held in the McEnery Convention Center in San Jose, CA on May 2-5, 2011. The yaSSL team will be talking about wolfSSL and the yaSSL Embedded Web Server, and will look forward to visiting with members of the embedded community!

If you are planning on attending ESC Silicon Valley this year and would like to visit, please let us know! You can email any comments or questions to

ESC Silicon Valley:

Secure Firmware Updates with wolfSSL

We believe that in today’s world of connected devices and heightened security concerns, digitally signing the firmware that is loaded onto your embedded or mobile device has become a top priority. One of the reasons that embedded RTOS environments do not include digital signature functionality is because it has historically not been a requirement for most embedded applications. This is no longer true today – without secure firmware updates, even if a system has been secured, a malicious firmware update can undermine much of the work which was put into securing the device.

wolfSSL is a popular tool for digitally signing applications, libraries or files prior to loading them on embedded devices and as such, it is ideal for signing firmware updates. Because wolfSSL supports the key embedded and real time operating systems, encryption standards, and authentication functionality, it is a natural choice for embedded systems developers to use when signing firmware updates.
Generally, the process for setting up code and file signing on an embedded device are as follows:
1. The embedded systems developer will generate an RSA key pair.
2. A server side script based tool is developed
a. The server side tool will create a hash of the code to be loaded on the device with SHA-256 for example.
b. The hash is then digitally signed, also called a RSA private encrypt.
c. A package is created that contains the code along with the digital signature.
1. The package is loaded on the device along with a way to get the RSA public key.  The hash is re-created on the device and then digitally verified (also called RSA public decrypt) against the existing digital signature.
Digitally securing your firmware updates can:

1. Protect against updates from unauthorized parties
2. Enable a secure method for allowing third parties to load files to your device
3. Ensure against malicious files finding their way onto your device
Do you need help setting up code signing for your firmware updates?  Let us know as we can help in setting up server-side scripts as well as device-side requirements.  Contact us at

More background on code signing:
A great article on the topic at embedded.com
General information on code signing:

Certificate Generation in CyaSSL 1.8.0

With the release of CyaSSL 1.8.0, users are now able to create CA signed x509 v3 certificates. Certificate generation is turned off by default, but may be turned on during the ./configure process with the following option or by defining CYASSL_CERT_GEN in Windows or non-standard environments:


Currently CyaSSL only supports the MD5_WITH_RSA signature algorithm type (which is by far the most common) and the creation of self signed certificates. The next release will allow other signers and other signature types. To create a self-signed certificate the general steps taken by the user include:

1. Create the Cert structure

2. Initialize the Cert structure

3. Complete the information in the CertName structure

4. Generate the self-signed certificate using any valid RsaKey and RNG.

The result of the above steps will be a DER formatted certificate which may also be converted into a PEM formatted certificate if desired. For more information on how CyaSSL generates RSA keys, please see the CyaSSL Extensions Reference, Section X. For complete details of the above steps to create a self-signed certificate and how you can create a CA signed certificate, see the CyaSSL Extensions Reference, Section XI.

For more information about CyaSSL, please contact

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