This minimization may be due to configuration and performance constraints. Note that we do not claim that there is a universal performance advantage of Cub over the earlier designs which applies to all working environments. On the contrary, we understand very well that stream cipher encryption may be fast comparing to a good scrambling mechanisms. What is more interesting is the minimization of encryption itself and the confinement of the entire cryptographic operation. Finally, we remark that since the design deals with the constraints of having a slow encryption whose use is minimized, it may fit well when the encryption employed is obviously much slower than available good scrambling techniques based on cryptographic hash functions.
Section discuss previous work on the subject.
Section introduces our model, and section presents the basic tools we will use. Section explains our new solution. Validation of the design via a security proof is given in section and experimental results are outlined in section . Finally section presents open problems and concludes the work.