[Cryptography] How to prove Wikileaks' emails aren't altered

[John Levine]

PS:

>This means that in a case where someone has hacked a system, if they have the email stores, they probably also have the DKIM signing key. If they have
>the DKIM signing key they can create whatever messages they want and sign them, with backdating and anything else they want.

In this case it's well documented that bad guys phished John Podesta
and took over his account to download all of his mail.  There is no
evidence of a compromise at gmail itself.

R's,
John