[Cryptography] Explaining PK to grandma

[James A. Donald]

> > We know in principle how implement email such that the from field works,

On 2013-11-28 01:03, Richard Clayton wrote:
> The DMARC folks would argue that they have already have a deployed
> scheme for doing this in _practice_, which now protects a very high
> proportion of mailboxes

If this works, I will have to retract what I have so frequently said 
about the dead weight of existing widely deployed protocols, and the 
incapacity of committees.

It is, however the umpteenth try to make spf and dkim actually useful, 
which is not a good sign.