Helmut Waitzmann Anti-Spam-Ticket.b.qc3c wrote: > Stefan Claas <s...@300baud.de>: > >Helmut Waitzmann Anti-Spam-Ticket.b.qc3c wrote: > >> Stefan Claas <s...@300baud.de>: > > [The ability to check that an encrypted message has been signed.] > > > >It would allow Alice (in her organization), or others, to do a > >pre-check, with procmail etc., to set-up an auto-responder, > >informing Bob that he did not signed his message and that his > >message will be discarded. > > >>> And is this optional in GnuPG, in case it is already > >>> implemented? > >> > >> As far as I know the order “first sign, then encrypt” is > >> mandatory, so there is no way for GnuPG to deviate from it. > >> > >> And this is a good thing, as it thwarts Eve eavesdropping on the > >> originator's identity (i. e. Bob) of a message sent to Alice. > > > >It should be not a mandatory feature and it should only append > >secured bytes, which are stating that Bob's message contains a > >signature (yes|no bytes), without revealing his identity. > > What do you mean by the term “secured bytes”?
Well, there should be a way that appended bytes to a signed and encrypted message could not be exchanged by third parties, to allow a pre-check (procmail etc.), like I explained, without the need that Alice has to decrypt the message manually and then check if the message was signed. While not being off-topic, how does for example Zero Knowledge Proof Encryption does a check that the identity of a user is proven, while the user does not have to reveal his actual age? He only proves with that, that he his over 18 years of age. While I am no programmer or cryptographer, I think if this is possible than something that I asked for should be somehow possible too, or not? Regards Stefan -- NaClbox: cc5c5f846c661343745772156a7751a5eb34d3e83d84b7d6884e507e105fd675 The computer helps us to solve problems, we did not have without him. _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
