Other Problems with PKI
nPKI
requires complete trust in one root authority.
qNo
globally defined single trusted root.
nPractically impossible to setup one (at least in the
foreseeable future)
qWhy
should I trust X completely?
nProblem
of certificate revocation
nIt may not
always be possible to validate a certificate chain all the way to the root (assuming one) because of network reachability issues