Then there are the risks of error by inexperienced users who are drawn to Checkra1n’s reliability, robustness, and its promise to work—on older devices, anyway—in perpetuity. “The biggest threat from Checkra1n is how easily a non-technical user can jailbreak their device, which then leaves it vulnerable to additional attacks,” Christoph Hebeisen, head of security research at mobile security provider Lookout, said.

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