That depends on how you define security. Nothing digital is secure. Apparently you have not read the numerous threads on FR or read Snowden’s comments regarding government cell phone surveillance.
Whether it be cell phones, computers, home security systems, it does not matter as all of it can be hacked. The latest craze in security is a VPN. By now there are those that have figured out a way around it. Once that becomes obvious there will be another security tool to be sold.
I have been trading stocks on internet for 25 years, hundred thousand or more transactions in 25 years, and transfering money from bank to broker hundreds of times. Never even close to being hacked. My method of preventing hacking and malware is so simple, it is hilariously ridiculous.