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.

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan

True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure

What are the two (02) benefits, which may result from a successful implementation of preventive maintenance (pm) program in an organization? (clo3)a)- lean manufacturing b)-overlapping responsibilities c)-the planner is not qualified d)-accurate contractor information e)-reduction in equipment redundancies f)-accurate stores information