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[Alan Westrope]

>           A subset implementation of the proposed Privacy
>           Enhanced Mail standard.  Not as secure as PGP or
>           Viacrypt PGP, but it is both free and free of patent
>           infringements in the USA.
> 
>  I just recently got MacRipem and find it much easier to use than PGP,
>  and was wondering why I should use PGP over Ripem.  The above seems to
>  indicate that Ripem isn't as secure.  Why is this?

Bruce Schneier's (excellent!) book states that the only info available to
someone cryptanalyzing a pgp-encrypted file is the six-digit key ID.  PEM
"leaves quite a bit of information about the sender, recipient, and message
in the unencrypted header."  (p. 436)

Alan Westrope                  <awestrop at nyx10.cs.du.edu>
KeyID: 359639                  <adwestro at ouray.denver.colorado.edu>
PGP fingerprint:  D6 89 74 03 77 C8 2D 43   7C CA 6D 57 29 25 69 23
finger for public key
--
"Ah, ah...see them there!  Like Gorgons, with gray cloaks,
 and snakes coiled swarming round their bodies!  Let me go!"
 -- Aeschylus, _The Choephori_  (4larry...:-)