The fingerprint data remains safe and unread and gets deleted as soon as it becomes decryption key
Fans of the iPhone 5s’s Touch ID fingerprint security will be thrilled to know that Apple has released tons of new information on the security feature. This pretty much clears out all your queries about how exactly the feature works. The iOS Security white paper which has received an updated version sheds light on what exactly happens to the data retrieved through the fingerprint when you touch the sensor on the phone. Some people might think that this information generated from the fingerprints will be at risk but this information is more hack resistant than you would think.
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There is a secure space at each A7 chip and this cannot be ready by Apple or even A7 and Apple ensures that every authentication session is encrypted end-to-end. The fingerprint doesn’t last for long in the memory; it only stays there in the memory till it has been turned into a decryption key. These keys which are talking about get wiped away by the safeguards following 48 hours of inactivity or five failed attempts.
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