[Cryptography] Generate Random Data From Sound Card

[Peter Gutmann]

Jon Callas <jon at callas.org> writes:

>>> Cameras (proper ones, not cellphones) already take advantage of this
>>> in dark- frame subtraction, with long exposures or high ISO shots
>>> they take images with the shutter closed to capture sensor noise and
>>> then subtract that from the actual image.
>
>What do you mean by "proper" camera?

Ones that have actual shutters.  Doing dark-frame subtraction without a
shutter to close to make the frame dark is pretty tricky.

Peter.