[Cryptography] Whitening Algorithm

Dave Horsfall dave at horsfall.org
Thu Jul 23 19:06:37 EDT 2015

On Thu, 23 Jul 2015, Ray Dillinger wrote:

> As a lightweight CSPRNG suitable for devices of modest compute power, I 
> recommend the 'Spritz' algorithm developed by Rivest & Schuldt.  
> Although it's fairly new, it seems quite good.

Bruce Schneier doesn't seem to like it, but thinks it's clever anyway:


``Spritz is Rivest and Schuldt's redesign of RC4. It retains all of the
  problems that RC4 had. It's built on a 256-element array of bytes, 
  making it less than ideal for modern 32-bit and 64-bit CPUs. It's not very 
  fast. (It's 50% slower than RC4, which was already much slower than 
  algorithms like AES and Threefish.) It has a long key setup. But it's a 
  very clever design.''

Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer"
Watson didn't say "I think there is a world market for maybe five computers."

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