warning alerts and antivirus system software detection. a businessman is holding a smartphone with a cautionary warning sign for

alert alerts antivirus attack business businessman caution cautionary communication computer crime cyber cybersecurity cyberspace danger datum detection electronic email errors firewall fraud graphic hacker hacking holding information internet laptop mail maintenance malware message mobile network notification office online password phishing phone privacy protection risk safety scam security send sign smartphone software spam spyware system threat update virus warning web website word