PolarSSL is now part of ARM Official announcement and rebranded as mbed TLS.

mbed TLS (formerly known as PolarSSL) makes it trivially easy for developers to include cryptographic and SSL/TLS capabilities in their (embedded) products, facilitating this functionality with a minimal coding footprint.

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Easy to use

mbed TLS offers an SSL library with an intuitive API and readable source code, so you can actually understand what the code does. Also the mbed TLS modules are as loosely coupled as possible and written in the portable C language. This allows you to use the parts you need, without having to include the total library. Read more

Easy to get

mbed TLS is dual-licensed and available as Open Source or under an mbed partnership. The dual licensing model enables you to use the open source version as well as a closed source commercial license. The commercial license is available as a one-time fee or a monthly subscription to be as flexible as possible. Read more