After Twitter, LinkedIn has also decided to tie account security to mobile phones.
After a series of high-profile hacks of Twitter accounts run by media organizations, Twitter introduced two-step verification last week. Google, Facebook, Microsoft and Twitter are major companies to deploy two-step verification process.
Linked In, based in Mountain View, California, has about 225 million users and now users will enjoy a secured linked In profiles. The extra step is designed to lessen the chances of computer hackers breaking into user accounts.