Read 3 articles daily and stand to win ST rewards, including the ST News Tablet worth $398.
Spin the wheel for ST Read and Win now.
Almost everything we do now leaves a digital trace.
Every action performed on a smartphone, whether tapping a Web link, "liking" a photo on social media or entering a phrase in a search engine, produces information that can be tracked.
Please subscribe or log in to continue reading the full article.
*Terms and conditions apply.
Join ST's Telegram channel here and get the latest breaking news delivered to you.
We have been experiencing some problems with subscriber log-ins and apologise for the inconvenience caused. Until we resolve the issues, subscribers need not log in to access ST Digital articles. But a log-in is still required for our PDFs.