Hacking series continuous on Major sites?

There are no specific tools for protecting blogs and Websites or account on Social sites, because in the first on the most popular social site “LinkedIn” had hacked and nearly 6.5 million usernames and passwords leaked after that breading of Yahoo Data of 500,000 of its users last month.
Now Dropbox also complained the same in this course few accounts of their users been hacked and necessary remedial measures in use. Dropbox after complaints from its users about receiving spam emails to their Dropbox accounts an investigation processed and found in leakage connection that few accounts were accessed by hackers.
Dropbox has assured that this won’t be continued in future necessary controls are placed in this regard to cease the leaks for intruding hackers.