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OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. It is also a general-purpose cryptography library.
LibreSSL is a fork of OpenSSL that was created to provide a more secure and modern codebase. It is developed as part...
BoringSSL is another fork of OpenSSL maintained by Google. It aims to provide a more modern and secure implementation while focusing on...
mbed TLS, formerly known as PolarSSL, is a lightweight, portable, and easy-to-use cryptographic and SSL/TLS library. It is designed for embedded systems...
Free and commercial options
GnuTLS is a secure communications library implementing the SSL, TLS, and DTLS protocols.
KeyStore Explorer is an open-source GUI replacement for the Java command-line utilities keytool and jarsigner. It allows users to manage keystores and...
Dogtag PKI is a Certificate System (CS) and Lightweight Directory Access Protocol (LDAP) server that supports several standards for certificate and key...
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