Regularly taken as synonyms, the words security and safety have essentially the same meaning in everyday language. When we look more precisely at the context, we detect a nuance of weight.
To learn more about these shades, read this article:
http://www.guidotti.fr/fr/page/securite-surete-quelles-differences.php
From industry experts
Safety is a set of devices intended to protect against risks whose cause is accidental. These can be technical, physical, chemical or environmental causes.
Security encompasses all the means dedicated to protecting people and property against malicious acts. Voluntary acts which can be, for example, theft, assault, attack, arson, etc.