>> "Werner" == Werner Koch <w...@gnupg.org> writes:

   > On Sat, 26 Oct 2013 22:03, o...@mat.ucm.es said:
   >> know by the date of the certificate which certificate to use for which
   >> message?
   >> 
   >> -  old for old messages

   > Note, that there is no need for a certificate for decryption - only the
   > private key is required.  The certificate is only used to show some meta
   > information.

Now I am confused. Most likely my knowledge of certificates is not
correct. (I played around with openssl to generate my own, useless,
certificates).

I thought a certificate consists of a key pair (private/public) which is
signed by the Authority (here comodo).
When I apply for a certificate, the keypair is generated by the crypto
module of the browser and then signed.

So I thought when I apply for a new certificate  a new key pair
is generated which gets signed again.

But your comment above seems to indicate that the old pair gets a new
signature. Is this correct?  But what if I apply with a different
browser I applied the last time.

thanks

Uwe Brauer 

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