OpenSSL

OpenSSL is an open-source software library and toolkit that provides cryptographic functions and tools to secure communications and data.

It offers implementations of encryption algorithms, SSL and TLS protocols, X.509 certificates, command-line utilities, cryptographic libraries, and more.

For example, the OpenSSL command generates an RSA private key, which can be used for secure authentication and data encryption.

OpenSSL is a critical component in securing network communications and is widely used in applications, systems, and protocols that require cryptographic operations.