Internet usage is growing dramatically, but the vast majority of
Internet users don’t have any security backgrounds. Nor do a
large majority of companies care about information security, and
the severity of any attack could harm the valuable assets of
these companies. They don’t give their employees security
awareness sessions, either. For these reasons, humans are the
weakest link in the information security chain.  In this article
we will talk about SSL protocol and SSL certificates, which will
help webmasters make sure that users’ information travels safely
through the Internet in a secure manner. Moreover we will talk
about invalid SSL certificates which could lead to stealing
users’ credentials or stealing sensitive information which could
be used in further attacks.  SSL protocol is in widespread use
in applications such as Web browsing, electronic mail, Internet
faxing, instant messaging and voice-over-IP (VoIP).  Information
Security Principles  As we know, the main practice of
information security is