Implement the Secure Sockets Layer and Transport Layer Security cryptographic protocols. Access an extensive library and work with a wide range of encryption algorithms, including Blowfish, MD5, SHA-1, DES, AES, RSA, DSA, and the Diffie–Hellman key exchange method.
Our software library provides a free download of OpenSSL 3.0.9. The program is categorized as Development Tools. The current setup file available for download requires 4.2 MB of hard disk space. This free program is a product of OpenSSL Team.
The following versions: 1.1, 1.0 and 0.9 are the most frequently downloaded ones by the program users. Commonly, this program's installer has the following filenames: cmd.exe, iexplore.exe, openssl.exe and unins000.exe etc. OpenSSL works fine with 32-bit and 64-bit versions of Windows XP/XP Professional/Vista/7/8/10/11. Our antivirus check shows that this download is malware free.
From the developer:
The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library.
You may want to check out more software, such as ClicksAndWhistles, stunnel or wolfSSL, which might be similar to OpenSSL.