Use de nition 2 of perfect secrecy (Lemma 2.4 of the textbook) to prove that the Vigenere cipher is not perfectly secret. Pr[EncK(m) = c] = Pr[EncK(m0) = c] (2.1) Lemma 2.4. An encryption scheme (Gen; Enc; Dec) with message space M is per- fectly secret if and only if Equation (2.1) holds for every m;m0 2 M and every c Є C.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines