Previous parts of this series have used the Global Directory for
storing public authentication information in the form of public key
material. These mechanisms are much better than the common poor man's
choice of using passwords. Unfortunately however, we are all poor men
(and women) in some parts of our daily lives; we all use protocols and
tools that are not capable of those advanced cryptographic exchanges.
And a plethora of scripted web-tools is not improving that! So the ideal
would be to publish a password verification method in the Global
Directory as well. The SRP mechanism makes this possible.