In the bathroom (29 percent); in the car (41 percent); in bed (58 percent). And these are just the survey respondents who fessed up.

These results, from a new study by Kaspersky Lab and B2B International, confirm how attached we've become to our smartphones and tables.

They've also become a sort of mobile diary — one-quarter of those surveyed said their device carries sensitive information they wouldn't want others to see, the survey found. And most (87 percent) said they store important, confidential and sometimes irreplaceable information on their smartphones, including passwords, photos, contacts, and files.

Outside the home, mobile users face risks that include damage, loss and theft of a device — as well as hacking by cybercriminals intent on stealing data or spying on the user.

However, the report found that just 26 percent of consumers adapt their online activity when on an insecure public Wi-Fi network.

"A failure to appreciate the potential risks and to protect our devices and information accordingly could mean the loss of confidential information, money and even identities," said Kaspersky Lab Head of Mobile Product Line Victor Yablokov. "Security is simply not an optional extra."

Kaspersky recommends that mobile device users set strong passwords for devices and online accounts, install a trusted security solution, and use caution when accessing websites and downloading apps, particularly over insecure Wi-Fi networks.

Find out whether your online behavior is safe and get tips on ways to protect yourself.