On Apr 8, 2013, at 7:38 AM, ianG <[email protected]> wrote:

> We all know stories.  DES is now revealed as interfered with, yet for decades 
> we told each other it was just parity bits.  

But it turned out that the interference was to make it *stronger* against 
attacks, differential cryptanalysis, that only the NSA and IBM knew about at 
the time. 

If history is a guide, weakness that TLAs insist on are transparent. They are 
about (effective) key size. We have no way to know whether this will continue 
to be the case, but I'd imagine that the gap in knowledge between the NSA and 
the academic community diminishes over time; so that makes me think that they'd 
be even more reluctant to try to slip in a hidden weakness today than in 1975. 

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