How secure is HTML5 local Storage for a Mobile Device

Question

I\'m looking to work around some performance issues on a mobile site by storing the data entered on multiple forms into the local Storage.

I will be clearing the da

Answer 1

Take a look at sessionStorage, which works similarly to localStorage but doesn't keep any data once a tab/window/browser is closed.

This would also be more secure than localStorage as no data would be kept once a session has ended. There is more details on security in the W3 Storage spec.

However if you're storing sensitive data I'd recommend cookies as data in sessionStorage and localStorage can be viewed and edited by the user and is potentially open to XSS attacks.