As those islands intensi?¬?ed intercommunication,
it became more of a problem, but nothing that
Non-passwordbased
authentication
schemas need
a level of agreement
that cannot be
achieved in the
fragmented reality
of the Internet
The Babel of Cryptography 59
cannot be resolved (at least tactically) without throwing the right
amount of money at it. That probably suggested that those techniques
were suitable for being safely extended to the Internet, as
it happened for passwords. Finally, the ubiquitous presence of
Internet access we enjoy today re?¬?ned the granularity of the
connected unit to the single individual. The sheer scale and
complexity of this new Net makes a number of those techniques
simply unfeasible, so you don??™t see them in the consumer space.
However, there are non-password-based authentication
schemes that can operate on the individual scale. The simple
fact that they can??™t interoperate, however, is a deal breaker for
supplying a universally valid authentication system. The simple
diversity of authentication schemes, necessary for addressing the
different need of the speci?¬?c scenarios they are designed for,
limits the user??™s capability to reuse the identity itself and the
pro?¬?ciency gained in handling a certain technique across multiple
services.
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