| 摘要 |
<p>A key, for use in generating a digital authentication signature, is generated from the fixed pattern noise (FPN) of a CMOS image sensor. The key is generated by temporarily disabling the FPN cancellation circuit conventionally included in the system and generating a substantially "black" image, to produce a digitised FPN signal. The key is then generated from characteristics of the FPN, in the preferred embodiment by comparing pairs of pixels. <IMAGE></p> |
