Apple Is Said to Be Trying to Make It Harder to Hack iPhones

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In the San Bernardino case, the F.B.I. wants to exploit that troubleshooting system by forcing Apple to write and install new software that strips away several security features, making it much easier for the government to hack into the phone. The phone in that case is an old model, but experts and former Apple employees say that a similar approach could also be used to alter software on newer phones. That is the vulnerability Apple is working to fix.