Insertion of information in transit so as to forge desired
communications. Examples include adding transactions to a transaction
sequence, insertion of routing information packets so as to reroute
information flow, and insertion of shipping address information to replace
an otherwise defaulted value.
Complexity: Although there appears to be a
widespread belief that insertion in transit is very difficult, in most cases
it is technically straight forward. Complexity only arises when defensive
measures are put in place to detect or prevent this sort of attack.