Mbed TLS

Mbed TLS
DeveloperCollaborative project managed by TrustedFirmware (formerly by Arm)
Initial releaseJanuary 15, 2009 (2009-01-15)
Stable release4.0.0 (15 October 2025 (15 October 2025)) [±]
Written inC
Operating systemMulti-platform
TypeSecurity library
LicenseDual Apache-2.0 or GPL-2.0-or-later
Websitewww.trustedfirmware.org/projects/mbed-tls/
Repository

Mbed TLS (previously PolarSSL) is an implementation of the TLS and SSL protocols and the respective cryptographic algorithms and support code required. It is distributed under the Apache License version 2.0. Stated on the website is that Mbed TLS aims to be "easy to understand, use, integrate and expand".