Thanks to the combination of technologies, smartphones can act as bank cards even when their batteries run out. To ensure the security of such digital payments, users can set a limit per transaction as well as a limit on the number of available, weak payments.
If the number of weak payments exceeds the specified threshold, no payment is made and if the amount paid exceeds the unencrypted limit, the user is asked to enter a password on the receiving device during the transaction.
Source: Ferra
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