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PEM: CAs and CRLs: Alternative model

1993-10-16 08:16:00
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Dear PEM Friends:

First  I  would  like  to  inform  Bob  Jueneman that in our
current PEM improvement activities our first priority is  to
extend  our  current PEM implementation somewhat "closer" to
the official RFC model, i.e.  soon  (I  hope  Christmas)  we
will have the system which will:

   a. use some "extended" form of the certificate, whatever
      that form means,
   b. our CAs will, in addition to storing CRLs locally,
      send CRLs to our PCA, as required in RFC 1422,
   c. our CAs will, in addition to distributing CURRENTLY
      VALID Certificates (on request), what they do today, 
      distribute also
      - CRLs (on request),
      - results of verifications of signitures,
   d. map somehow X.520 attributes to DNs, E-mail addresses,
      etc.

Next,   to   those   PEMers   who  are  a  little  bit  more
"conservative", I would like to guarantee that our next  PEM
version  WILL  NOT  violate  any  RFC  requirement,  all our
alternative ideas will be implemented as add-ons.

If everything shows functional and usefull, I hope this will
be  a  small  contribution to the PEM business applicability
and, hopefully,  if  documented,  to   PEM   standardization
process.

I  believe  that different, alternative to RFCs, suggestions
on this list are very helpfull  to  us.   With  our  limited
manpower  resources  we  will  try to make some new steps in
order to test and prove these ideas.

I  hope that alternative CRLs and Ca-functionality model are
not against PEM, quite contrary, for  its  future  benefits.
My  impression  is  that  all these current disagreements on
this list  come  from  the  fact  that  PEM  was  originally
envisioned  and  designed as the "Secure E-mail System", but
today it is obvious that it may very nicely be  functionally
extended   to   a   broad   range   of  electronic  business
transactions,  which  do  have   a   little   bit   stronger
requirements that just a secure E-mail.  


Regards,

Sead Muftic
COST Computer Security Technologies
Stockholm,, Sweden

  
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