Re: [Evolution] Evolution/GPG



Great! That's what I was thinking. So, the importation of keys is no
problem. I just wondered if that's enough for Evolution. All my contacts
are already on my key-ring. I was wondering if Evolution kind of looked
them up from my key-ring for encryption in Evolution? I was curious if I
had to import them into Evolution in addition to importing them to my
key-ring (which I always do in my terminal). 

Thanks again!
SRW

fr. den 05. 02. 2016 klokka 12.45 (+0000) skreiv Patrick O'Callaghan:
On Fri, 2016-02-05 at 13:15 +0100, Stig Roar Wangberg wrote:
Ah, I think I'm beginning to understand. So this is another form of
encryption, still using the receiver's public key, and s/he still has
to use his or her private key to decrypt the message? 

It's not *another* form of encryption. It's how PGP encryption works.
The receiver's public key is used to encrypt a random symmetric session
key which in turn is used to encrypt the message body. The receiver
uses his/her private key to decrypt the symmetric session key and
thence the message. Consult any of the docs on PGP for more detail, or
read Zimmerman's book.

Public key systems nearly always work this way because it would be too
expensive to use the asymmetric algorithms on the message body itself.

As for *signing* the message, that uses your private key to encrypt a
hash of the message. It can then be checked by anyone with access to
your public key.

poc
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