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At blog post https://cryptocow.com/?p=201 we've been experimenting with using sensors to upgrade PRNG's, and we frankly can't understand why this isn't been used natively in Android RNG implementations... It's trivial, easy and tremendously increases the RNG quality.

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Because a sensor provides an entropy source, not a whole CSPRNG. Most modern CSPRNGs have interfaces to feed entropy into the system, but CSPRNG designs do more than simply route entropy from one place to another.

This is a really common misconception people seem to have about cryptographic random number generation, and a topic Ferguson and Schneier do an extremely good job breaking down in _Cryptography Engineering_.

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