From:    Raymond Paquin                         Area: Public Key Encryption
To:      John Stephenson                        17 May 95 14:58:56
Subject: RSA                                    UpdReq 

 JS> You say that d is any number between 1 and x that 
 JS> is not a factor of x.
 JS> Simply this means that "x mod d <> 0", ie doesn't evenly divide. But
 JS> then you say that (e*d)/x = 1! Or that e*d=x, how could that work
 JS> if the modulus isn't taken into account? E would 
 JS> have to a real number!
 JS> Impossible!
 JS> Maybe you meant that gcd(d,x)=1, ie d is relatively prime to x? If you
 JS> did, or if you meant something else please give me an example (showing
 JS> p,q,n,(p-1)*(q-1),d,e, and an example of encryption and decryption) 
 JS> using small prime numbers of your choice (ie 2,3,5,7..)
He meant that e*d == 1 mod((p-1)*(q-1)) ie: the remainder of the division 
should be 1 after division by (p-1)(q-1).
 JS> Has anyone here implemented true RSA, or is everyone just re-echoing 
 JS> incorrect information? Help!
I have, but there are many pitfalls that don't occur to those whose experience 
is limited to mathematics and/or programming.
Ciao...


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From:    Shawn McMahon                          Area: Public Key Encryption
To:      jason carr                             17 May 95 18:33:08
Subject: Re: Pgp Stuff Available                UpdReq 

Despite the stern warnings of the tribal elders, jason carr said this to Ted 
Rolle:
 jc> You could compile your nodelist index using only Zone 1, then set 
 jc> your mailer to only allow FREQs from nodelisted systems.
In which case, you're no longer entitled to an Xx flag in the nodelist.  A lot 
of people forget that; you can't advertise capabilities you don't actually 
implement, and the Xx flags show that you allow freqs from Fidonet systems.  
No fair telling 6 zones you have it, when you only allow 1 to use it.
Not that loss of your Xx flag is any big deal, of course.  Just pointing it 
out, since wrong nodelist flags are a pet peeve of mine.


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