[arch-general] Upgrading password hashes

[Kevin Chadwick]

> further:
> 
> http://stackoverflow.com/a/1561245/404019
> http://en.wikipedia.org/wiki/Bcrypt
> 
> ... i can't find any literature suggesting sha512 decreases your
> security, and no reason to bother switching.  both are good solutions.

This is interesting WRT memory usage. Whether it's a reason to bother
switching or coding in the first place is still debatable of course.

http://www.h-online.com/security/news/item/John-the-Ripper-now-able-to-crack-office-files-and-use-GPUs-1631901.html

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