Part III: Limitations


"If you think cryptography can solve your problem, then you don't understand your problem, and you don't understand cryptography." -- Bruce Schneier

Security is only as good as the weakest link; the role of cryptography is to ensure that the data communication is not the weak link.

Using strong crypto in an otherwise insecure system is "like using an armored carrier to send something from someone who lives in a cardboard box to someone who lives on a park bench".