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Effective cyber security today means identifying threats before attacks occur and securing your most valuable assets.

The nature of cyber threats has changed—and so too should the way enterprises prepare and respond. Mischievous hackers have largely been replaced by sophisticated cyber criminals who are often well-resourced and potentially even sponsored by national governments. Today’s cyber criminals are highly skilled and dedicated enough to wage multiyear campaigns to infiltrate corporate networks and gain access to valuable assets. To make matters worse, their tactics keep shifting as companies try to protect themselves.

Traditional approaches to cyber security that focus on identifying when an attack has happened, repairing the breach, and eliminating the vulnerability aren’t effective today. To regain the high ground, companies need to become much more proactive. Leading companies are protecting their valuable assets by applying intelligence and advanced techniques to identify and defend against threats before attacks occur. They are also thinking more broadly about protecting a network that includes customers, suppliers, and other business partners.

It’s not a matter of reaching the finish line and declaring victory. Enterprises will need to continue building their cyber security capabilities to match—if not exceed—the growing sophistication of cyber crime tactics. Kieran Norton, a principal with Deloitte & Touche LLP, provides an overview of the cyber crime landscape and how to proactively respond.