[Cryptography] Symmetric cipher + Backdoor = Public Key System

[Jerry Leichter]

On Sep 7, 2013, at 7:56 PM, Perry E. Metzger wrote:
>> I'm not as yet seeing that a block cipher with a backdoor is a public 
>> key system,
> 
> Then read the Blaze & Feigenbaum paper I posted a link to. It makes a
> very good case for that, one that Jerry unaccountably does not seem to
> believe. Blaze seemed to still believe the result as of a few days ago.
I've given quite a bit of argument as to why the result doesn't really say what it seems to say.  Feel free to respond to the actual counterexamples I gave, rather than simply say I "unaccountably" don't believe the paper.

                                                        -- Jerry