Markel Insurance Co. has launched a new line of insurance coverage for health care providers. The new coverage provides protections against cybercrime and hacking. The Affordable Care Act requires that an individual’s medical and insurance information be stored electronically as part of a state-run insurance exchange. The exchange system is designed to give consumers access to affordable insurance coverage, but their information may be the target of hackers eager to test the defenses of the new system. U.S. companies became acutely aware of the dangers inherent in the digital world…