Take the 2-minute tour ×  Identity based encryption schemes [*]
seem to have great potential in high-latency Delay-Tolerant and
mobile, ad-hoc networks since they apparently seem to avoid the
need for key negotiation and exchanges. Used soley for key
exchange, they allow any pair of members in the same group
(however you choose to define it) to establish a unique pairwise
secret that can be computed by each member up-front and as a
function of their respective identities.  However, since each
pairing based scheme - that I'm aware of - is predicated on a
pre-distribution of some shared secret (e.g., the hashed ID of
the agent raised to some secret integer), do any of these
schemes offer any significant advantages over, let's say, a
simple authenticated diffie-hellman (at least for purposes of
symmetric key establishment)?  [*] Including pairing-based
symmetric-key establishment schemes.  share|improve this
question add comment  1 Answer  IBE is advantageous over
standard asymmetric methods in one aspect, and t