The author specifically mentions he doesn't write about cryptography. > The idea of what constitutes a good RNG depends on how the RNG is applied. That is why,

The author specifically mentions he doesn't write about cryptography. > The idea of what constitutes a good RNG depends on how the RNG is applied. That is why, for example, a generator may be considered high-quality for simulation while being considered unacceptable for cryptography. This chapter looks at tests of statistical quality and does not address tests for cryptographical security.