Of the use of unpredictableSeed

[Shachar Shemesh via Digitalmars-d]

On 26/02/17 20:23, cym13 wrote:
> Hi,
>
> I found many times that people use unpredictableSeed in combination with
> normal PRNG for cryptographic purpose. Some even go as far as reseeding
> at each call to try making it more secure.
>
> It is a dangerous practice, most PRNG are not designed with security
> (and unpredictability) in mind, and unpredictableSeed was definitely not
> designed with security in mind (or it failed heavily at it). It's a good
> tool when one needs randomness, not security.
>
> I wrote a blog post to present exactly why this is a bad idea and how it
> could be exploited [1].
>
> The best would be to add a standard CSPRNG interface to Phobos but we
> aren't there yet.
>
> [1]: https://cym13.github.io/article/unpredictableSeed.html

Excuse me if I'm asking a trivial question. Why not just seed it from 
/dev/urandom? (or equivalent on non-Linux platforms. I know at least 
Windows has an equivalent).

Shachar