Your phone knows more about you than you think.

It knows where you've been and who you were with, the birthday gift you bought your mother and who you plan to vote for. Sex last night? It knows that too if you're using one of the applications for couples trying to conceive.

From pre-installed apps that count your steps to saved passwords for banking accounts and social media, smartphones have evolved from devices that make calls into digital repositories for the most intimate details of life.

"You can extract enough information on a typical person's phone that you can construct a virtual clone of that individual," said Elad Yoran, executive chairman of Koolspan Inc., a communications security company. "They are the windows not just into our personal lives but they are equally the windows into our professional lives."