The OpenSSL is widely used and implemented version of the SSL/TLS.

The data includes emails, messages, credit card information, passwords and similar sensitive information. These protocols prevent attackers to read or modify the data by encrypting them. SSL and TLS protocols are responsible in maintain safe and secure internet connection which safeguards the data being sent or received.

HeartBleed is a flaw in OpenSSL implementation of SSL (Secure Socket Layer) and TLS (Transport Layer Security).