MbedTLS vs. WolfSSL

Attribute	MbedTLS	WolfSSL
License	Apache License 2.0	GPLv2 and commercial license
Supported protocols	TLS, DTLS	TLS, DTLS, SSH
Memory footprint	Low	Low
Performance	Good	Good
Platform support	Wide range	Wide range

Introduction

When it comes to implementing secure communication protocols in embedded systems, developers often turn to libraries like MbedTLS and WolfSSL. Both libraries offer a range of features and capabilities that make them popular choices for IoT devices, industrial control systems, and other resource-constrained environments. In this article, we will compare the attributes of MbedTLS and WolfSSL to help developers make an informed decision about which library to use in their projects.

Performance

One of the key considerations when choosing a cryptographic library for embedded systems is performance. MbedTLS is known for its lightweight and efficient implementation, making it a popular choice for devices with limited processing power and memory. On the other hand, WolfSSL also offers excellent performance, with optimizations for various platforms and architectures. Both libraries are designed to minimize resource usage and provide fast cryptographic operations.

Supported Algorithms

Another important factor to consider is the range of cryptographic algorithms supported by each library. MbedTLS provides support for a wide range of algorithms, including AES, RSA, ECC, and SHA. WolfSSL also offers support for these algorithms, as well as additional ones like Camellia and ChaCha20. Developers can choose the library that best fits their security requirements based on the algorithms they need to use in their applications.

Security Features

Security is paramount when it comes to implementing cryptographic protocols, and both MbedTLS and WolfSSL offer a range of security features to protect data and communications. MbedTLS includes features like secure random number generation, certificate verification, and support for secure communication protocols like TLS and DTLS. WolfSSL also provides similar security features, along with additional options for customizing security settings and protocols.

Community Support

Community support and documentation are essential for developers who are new to using cryptographic libraries. MbedTLS has a large and active community of users and contributors, with extensive documentation and resources available online. WolfSSL also has a strong community presence, with forums, mailing lists, and documentation to help developers get started with the library. Both libraries have a wealth of resources to support developers in implementing secure communication protocols.

Licensing

Licensing is another important consideration when choosing a cryptographic library for embedded systems. MbedTLS is licensed under the Apache License 2.0, which allows for both commercial and non-commercial use with relatively few restrictions. WolfSSL, on the other hand, is dual-licensed under the GPLv2 and a commercial license, giving developers the flexibility to choose the license that best fits their project requirements. Developers should carefully review the licensing terms of each library before incorporating them into their projects.

Integration and Portability

Integration and portability are key factors to consider when selecting a cryptographic library for embedded systems. MbedTLS is designed to be easily integrated into existing projects, with support for various platforms and operating systems. WolfSSL also offers excellent portability, with support for a wide range of platforms and architectures. Both libraries are well-suited for use in embedded systems and can be easily integrated into different environments.

Conclusion

In conclusion, both MbedTLS and WolfSSL are excellent choices for implementing secure communication protocols in embedded systems. Developers should consider factors like performance, supported algorithms, security features, community support, licensing, and integration when choosing between the two libraries. Ultimately, the decision will depend on the specific requirements of the project and the preferences of the development team. By carefully evaluating the attributes of MbedTLS and WolfSSL, developers can make an informed decision that meets their security and performance needs.