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Apple could justify the adoption of certified USB-C chargers offering more security to iPhone users. The C-AUTH accessory makes it possible to uniquely determine the material identity of accessories to . This can help detect faulty parts or cheap and badly finished replicas. The risk of damage to the iPhone by potentially dangerous power adapters would be reduced.
Since USB PD 3.0 is enabled, the fast charge function is only available with 18 watts if the respective charger can be identified via C-AUTH. If authentication fails, charging is only possible with up to 2.5 watts.
The C-AUTH protocol was developed by the nonprofit organization USB Implementers Forum. Since Apple is a member of the organization, the implementation of the protocol is likely to occur in one of the future generations of iPhone.
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