wolfSSL embedded TLS library by wolfSSL is a lightweight, portable SSL/TLS library written in C, designed for standard, embedded, and RTOS environments due to its size, speed, and features. It supports industry standards up to TLS 1.3 and DTLS 1.3, and is up to 20 times smaller than OpenSSL. wolfSSL offers a simple API, an OpenSSL compatibility layer, OCSP and CRL support, and is backed by the robust wolfCrypt cryptography library. It is designed for maximum portability and is easy to compile on new platforms. wolfSSL supports hardware cryptography and acceleration on several platforms and is dual licensed under both the GPLv2 and commercial licensing. It is used in markets like smart grid, industrial automation, connected home, M2M, auto industry, games, applications, databases, sensors, VoIP, routers, appliances, cloud services, government, military, and aviation. Over 2 billion applications and devices are secured with wolfSSL products.