What is Heartbleed?
On Monday the OpenSSL project announced a serious vulnerability, nicknamed “Heartbleed”. SSL is the encryption used to make the internet secure when transferring sensitive information, such as usernames and passwords. OpenSSL is the most popular open source encryption software and is widely used.
The Heartbleed vulnerability meant that it was theoretically possible for someone to collect and decrypt information passing through any secure site using OpenSSL, for example, an ecommerce site or bank.