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Course: MBA IT DOM1, Spring 2012
School: Indian Institute of...
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has This been a description of how to use the DES algorithm to encrypt one 64-bit block. To decrypt, use the same process, but just use the keys K[i] in reverse order. That is, instead of applying K[1] for the first iteration, apply K[16], and then K[15] for the second, on down to K[1]. Summaries: Key schedule: C[0]D[0] = PC1(key) for 1 &lt;= i &lt;= 16 C[i] = LS[i](C[i-1]) D[i] = LS[i](D[i-1]) K[i] =...

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has This been a description of how to use the DES algorithm to encrypt one 64-bit block. To decrypt, use the same process, but just use the keys K[i] in reverse order. That is, instead of applying K[1] for the first iteration, apply K[16], and then K[15] for the second, on down to K[1]. Summaries: Key schedule: C[0]D[0] = PC1(key) for 1 <= i <= 16 C[i] = LS[i](C[i-1]) D[i] = LS[i](D[i-1]) K[i] = PC2(C[i]D[i]) Encipherment: L[0]R[0] = IP(plain block) for 1 <= i <= 16 L[i] = R[i-1] R[i] = L[i-1] xor f(R[i-1], K[i]) cipher block = FP(R[16]L[16]) Decipherment: R[16]L[16] = IP(cipher block) for 1 <= i <= = 16 R[i-1] L[i] L[i-1] = R[i] xor f(L[i], K[i]) plain block = FP(L[0]R[0]) To encrypt or decrypt more than 64 bits there are four official modes (defined in FIPS PUB 81). One is to go through the above-described process for each block in succession. This is called Electronic Codebook (ECB) mode. A stronger method is to exclusive-or each plaintext block with the preceding ciphertext block prior to encryption. (The first block is exclusive-or'ed with a secret 64-bit initialization vector (IV).) This is called Cipher Block Chaining (CBC) mode. The other two modes are Output Feedback (OFB) and Cipher Feedback (CFB).
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Indian Institute of Technology, Madras - MBA IT - DOM1
16,7,27,20,13,2,41,52,31,37,47,55,30,40,51,45,33,48,44,49,39,56,34,53,46,42,50,36,29,32;static int nls[17] = cfw_0,1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1;static int cd[56],keyb[64];static int cnt,n=0;register int i,j;for(i=0;i&lt;8;i+) /*Read in key*/for
Indian Institute of Technology, Madras - MBA IT - DOM1
register int i,j;static int n,row,col,scnt;static int p[32]=cfw_16,7,20,21,29,12,28,17,1,15,23,26,5,18,31,10,2,8,24,14,32,27,3,9,19,13,30,6,22,11,4,25;static int e[48] = cfw_32,1,2,3,4,5,4,5,6,7,8,9,8,9,10,11,12,13,12,13,14,15,16,17,16,17,18,19,
Indian Institute of Technology, Madras - MBA IT - DOM1
Superb. Do you have what I asked for?The killers eyes glistened, black like oil. He produced a heavy electronic device and set it on the table.The man in the shadows seemed pleased. You have done well.Serving the brotherhood is an honor, the killer sai
Indian Institute of Technology, Madras - MBA IT - DOM1
Langdons aversion to closed spaces was by no means debilitating, but it had always frustrated him. Itmanifested itself in subtle ways. He avoided enclosed sports like racquetball or squash, and he had gladlypaid a small fortune for his airy, high-ceilin
Indian Institute of Technology, Madras - MBA IT - DOM1
The next day, newspapers around the globe carried the same headline. The killer became a believer.Now, fifteen days later, the killers faith had solidified beyond the shadow of a doubt. The brotherhoodendures, he thought. Tonight they will surface to re
Indian Institute of Technology, Madras - MBA IT - DOM1
Langdon searched in vain for a seat belt. Why not make it three and get us therealive?The car raced on.Do you like Reba? the pilot asked, jamming a cassette into the tape deck.A woman started singing. Its just the fear of being alone . . . No fear he
Indian Institute of Technology, Madras - MBA IT - DOM1
Look at all the girls crying by the school.Galveston, oh Galveston Another luxury wagon parks up ahead, with even more flowers, even more girls. Itmaneuvers slowly around the stains on the road. Strangers with cameras move back tofit it all in.I stil
Indian Institute of Technology, Madras - MBA IT - DOM1
static int invp[64]=cfw_40, 8,48,16,56,24,64,32,39, 7,47,15,55,23,63,31,38, 6,46,14,54,22,62,30,37, 5,45,13,53,21,61,29,36, 4,44,12,52,20,60,28,35, 3,43,11,51,19,59,27,34, 2,42,10,50,18,58,26,33, 1,41, 9,49,17,57,25;void des_encrypt(unsigned char *in
Indian Institute of Technology, Madras - MBA IT - DOM1
static int cnt,rtemp,n;register int i,j;for(i=n=0;i&lt;8;i+)for(j=0;j&lt;8;j+) inputb[n+]=(input[i]&gt;j&amp;0x01);for(i=0;i&lt;64;i+)cfw_ /*Initial Permutation*/lr[i]=inputb[p[i]-1];if(i&lt;32) l[i]=lr[i];else r[i-32]=lr[i];for(cnt=16;cnt&gt;0;cnt-)cfw_ /*Main decryp
Indian Institute of Technology, Madras - MBA IT - DOM1
static int invp[64]=cfw_40, 8,48,16,56,24,64,32,39, 7,47,15,55,23,63,31,38, 6,46,14,54,22,62,30,37, 5,45,13,53,21,61,29,36, 4,44,12,52,20,60,28,35, 3,43,11,51,19,59,27,34, 2,42,10,50,18,58,26,33, 1,41, 9,49,17,57,25;2];Professor Robert Langdon had s
Indian Institute of Technology, Madras - MBA IT - DOM1
although I used to get pissed that he wouldn't let me use his rifle, like Mr Navarro letJesus use his. Now I cuss the day I ever saw my daddy's gun, and I guess Jesuscusses his day too. He needed a different role model, but nobody was there for him.Our
Indian Institute of Technology, Madras - MBA IT - DOM1
nature, in case you didn't know. Same goes for Vaine Gurie, who I spy in the road bymy house. Storms clouds park over her patrol car.'Pam, stop! Leave me right here ''Get a grip, we're nearly home.' Pam don't stop easy once she's going.My house is a p
Indian Institute of Technology, Madras - MBA IT - DOM1
'Well wait,' says Mom. 'There's something you should know - Vernon suffers from akind of - condition.' She rasps it like it's cancer.'Heck, Momma!''Vernon Gregory, you know you get that inconvenience!'Jesus, fuck. My overbite grows a yard. Moltenbomb
Indian Institute of Technology, Madras - MBA IT - DOM1
RSA is one of the most popular encryption algorithms around. It was invented in1977 by three MIT scientists; Ronald Rivest, Adi Shamir and Leonard Adelman.This algorithm uses very very large prime numbers to generate public and privatekeys. For more de
West Point - BUS - 1
HR practiceQ1. UC has set itself a challenging goal-to jump into the rank of top one-thirduniversities1. What would be the roles and role-change of HR will play in UCs strategicplan.2. How to revamp HR practice in the following area:a. Recruitment a
Binghamton - CHEM - 108
2-13-09 A = B + C Small KK&lt; 10-6 K = [B][C]/AB o = Co = 0 Ao = 3 [A]eq = 3-1x [B]eq =[C]eq = +1x 3- x 3if K small1B + 1CBo + xx..K = 3x10-8 = x2/3-x x2/3 X2 = 9x10-8 X = 3x10-4Note3-x = 3 - .0003 3.K = 3x10-8 = x2/3-x x2/3 X2 = 9x10-8
Binghamton - CHEM - 108
Chapter19:ElectrochemistryOxidationReductionReactionsInChapter4weintroducedthehalfreactionmethodforbalancingsimpleoxidationreductionreactions. Oxidation-reduction reactions alwaysinvolve a transfer of electrons from onespecies to another. Recall
Binghamton - CHEM - 108
February 11, 2009. Clicker question Kinetics Use the steady state assumption to findthe concentration of A* in the kineticmechanism and the rate of formation ofproductK1 bimolecular A + B A* + B A* + B A + B k-1 bimolecular A* P (Product) k2 uni
Binghamton - CHEM - 108
February 18, 2009Multiple EquilibriaE + S ES Step11E fE = 1/cfw_1 +K[S] [E] = Et feKAssign E = 1, K[S] to ESK[S]ESfES = K[S]/cfw_1+k[S][ES] = EtfES. For exampleif K[S] = 2, Et = 2M fE = 1/cfw_1+2 = 1/3 fES = 2/cfw_1+2 = 2/3M[E] = 2(1/
Binghamton - CHEM - 108
February 25, 2009Topics ListKinetics 8 questionsWriting rate equationsFirst order half livesRate ratios for orderSteady stateActivation energyCollision theoryArhenius plotsEquilibrium 12 questionsManipulating eqm constantsKp vs KcEquilibrium
Binghamton - CHEM - 108
Final Exam Part 1 TopicsUsing the ACS Guide available on reserve in the Bartle Library, please focus on thefollowing topics:Energetics (mostly the last 8 questions on entropy and free energy)DynamicsEquilibriumElectrochemistryDescriptive Chemistry
Binghamton - CHEM - 108
Final Exam ReviewKineticsH2O2 can be used as a disinfectant; it decomposes as:2 H2O2 2 H2O + O2If the rate of appearance of O2 is 0.0014 Ms1, what is therate of disappearance of H2O2?a)b)c)d)0.0014 Ms10.00070 Ms10.0028 Ms1None of the above ar
Binghamton - CHEM - 108
Chemistry 108Monday, Jan 26Course OutlineIntroductionGradingBooksNo dropped examsGoal Properties Rate changes prop to cdc/dt =Rate = -kc10min half life 240 persons10min 120 left20min60 left30min30 left15min15 left 10min is half life (t1
Binghamton - CHEM - 108
Chemistry 108Wednesday, Jan 28 First order process n=1 dc/dt =Rate = -kcn = -kc If R = 2M/sfor c = 1M And R = 4M/s for c = 2M Ratio R2/R1 = (c2/c1)n 4/2 = (2/1)nn=11st order First order half livest1/2 = 10min 1Mt1/2 = 10min 2M [t1/2(2)/t1/
Binghamton - CHEM - 108
Chemistry 108Friday, Jan 30Making Rate EquationsAk1k-1BA:d[A]/dt = -k1[A] + k-1[B]Bd[B]/dt = + k1[A] k-1[B]Which one?Rules: If rate involves product (right side), divide by stoichiometric coefficient andmultiply by +1If rate involves reactan
Binghamton - CHEM - 108
Chapter 14:Chemical Equilibrium1Lecture OutlineMini-exam 1 resultsDrop/add deadline TODAYLON-CAPALabEquilibriumExpectations for next lecture2Lab Experiment Introduction:Chemical EquilibriumFe3+ +SCN-yellowcolorlessFeSCN2+red+3Fe3+ + S
Binghamton - CHEM - 108
Chapter 20:Nuclear ChemistryNuclear ChemistryIn this chapter we will look at two types ofnuclear reactions. Radioactive decay is the process in which anucleus spontaneously disintegrates, giving offradiation. Nuclear bombardment reactions are thos
Binghamton - CHEM - 108
Chapter 20:Nuclear ChemistryMass-Energy CalculationsWhen nuclei decay, they form products oflower energy. The change of energy is related to the change inmass, according to the mass-energy equivalencerelation derived by Albert Einstein in 1905. En
Binghamton - CHEM - 108
Chapter 22:Chemistry of theMain-Group Metals1General ObservationsSeveral general observations can be madeabout the main-group elements. First, the metallic characteristics of theseelements generally decrease across a periodfrom left to right in t
Binghamton - CHEM - 108
Chapter22:TheTransitionElementsandCoordinationCompounds1Lab9B&amp;C:AnalysisofanIronOxalatoComplex29B:%K+&amp;Fex+DeterminationUseofionexchangewithH3O+followedbytitrationtodetermineK+FurthertitrationwithNaOHsolutionbreaksdowntheironoxalatocomplextoyie
Binghamton - CHEM - 108
Chapter22:TheTransitionElementsandCoordinationCompounds1ValenceBondTheoryofComplexesValencebondtheorygavetheearliesttheoreticaldescriptionoftheelectronicstructureofacomplex. According to this theory, a complex forms whendouble occupied ligand or
Binghamton - CHEM - 108
Chapter22:TheTransitionElementsandCoordinationCompounds1VisibleSpectraofTransitionMetalComplexesColorintransitionmetalcomplexesisexplainedasduetoajumpofanelectronfromthelowerenergytothehigherenergydorbitals. The crystal field splitting can be ob
Binghamton - CHEM - 108
Chapter 24:Organic Chemistry1Organic ChemistryOrganic chemistry is the chemistry ofcompounds containing carbon. In this chapter we will discuss the structuralfeatures of organic molecules, nomenclature, anda few important chemical reactions.2The
Binghamton - CHEM - 108
Chapter 24:Organic Chemistry1Naming Substituted AromaticRings Benzenoid CompoundsTraditional naming system relied on ortho (o-),meta (m-), and para (p-) convention relative to thehighest priority carbon on the ringOrtho position corresponded to th
Binghamton - CHEM - 108
Chapter 23:Organic Chemistry1Derivatives of HydrocarbonsA functional group is a reactive portion ofa molecule that undergoes predictablereactions. Table 23.7 lists some common organic functionalgroups. In the previous sections we discussed thehy
Binghamton - CHEM - 108
Chapter 24Polymer Materials:Synthetic and BiologicalSynthetic PolymersPolymers are species of very highmolecular weight consisting of many units(monomers). A simple example is polyethylene, which consistsof many ethylene units, -CH2CH2-, covalentl
Binghamton - CHEM - 108
Chapter 24: Synthetic andBiologial PolymersBiological MembranesAmphiphilic lipids form membranePolar head group and non-polar tail interact tominimize energy by maximizing hydrophobicand hydrophillic interactionsLipids tend to form a bilayer driven
Binghamton - CHEM - 108
March 2, 2009Solubility ProductCommon Ion [Ag][Cl] = 10-10 If nothing elseX = [Cl- ]= [Ag-] X2 =[Ag][Cl] = 10-10 X = 10-5 = [Cl-] = [Na+] start adding NaCl Na+ + Cl- in solution 10-3M Na+ + 10-3M Cl(10-3 + 10-5)[Ag] (10-3)[Ag] = 10-10[Ag] = 10-
Binghamton - CHEM - 108
March 4, 2009Donnan EquilibriumDonnan Equilibrium Ksp (KCl) = [K][Cl] Two saturated solutions adjacent K+ + ClK+ + Cl#1#2 No motion between solutions Ksp(KCl, 1) = Ksp (KCl, 2) [K+]1 [Cl-]1 = [K+]2 [Cl-]2 If 1mM KCl in # 1 Then 1mM in #2 [1][
Binghamton - CHEM - 108
March 6,2009 Thin glass permeable to H+ but not anionsInsideOutside?2x10-6 Measure = i o = -25lncfw_[H]I /[H]o) = +18mV 18 = -25lncfw_2x10-6/[H]o 0.7 = - lncfw_2x10-6/[H]o[H]o = 4x10-6 2 = + [H]o/2x10-6Osmotic Pressure = RT cc concentration
Binghamton - CHEM - 108
March 9, 2009Atomic Solids Law of Dulong and Petit Any atomic solid e.g. Li, U hasC v = 3R Each atomcavity.three vibrations in crystal Heat capacity 3R for crystal decreaseswith temperature Lower temperature can absorb less heat? AT absolute ze
Binghamton - CHEM - 108
March 11, 2009 Reaction Initial and final molecules have there ownpotential energies independent of path Energy of reaction lost (-) or added (+) isoutsideA BHr = -100,000 If ADCBHr = -100,000Hess LawFind enthalpy (or energy) for any reaction
Binghamton - CHEM - 108
March 13, 2009 This is now a heat machine 23Latm our 17 used to return piston at coldertemperature 23-17 = 6 = extra work available to turn awheel. Summary draw in heat at hot temperature and itdoes work T constant so no E Total work divides into
Binghamton - CHEM - 108
March 16, 2006 No net heat was added but use heatconverted to work and get entropy S = qrev/Tso qrev = TS There is heat in the molecules eventhough all the added heat was used to dowork Thats happening? Qrev is a latent or hidden heat that isrel
Binghamton - CHEM - 108
March 19, 2009 Boltzmannno change just S S = kln(#states) Classroom 100 seats if 1 student can sit inany of 100 seats S = 1 kln(100) =4.6k 2 studentsS = 2 k ln(100) = kln(100)2 Illustrate with two seats , 2 students total states = Sn S # of seat
Binghamton - CHEM - 108
March 20, 2009Total Entropy Entropy change for vaporization at 400K S = 32,000/400 = 80J mol-1k-1+32000J of heat added from surroundingsqsurroundings = -24,000AndSsur = -24000/400 = -80J K-1mol-1Suniv = Ssys + Ssur = 80 -80 = 0For this equilibriu
Binghamton - CHEM - 108
March 24, 2009Solubility productCommon IonKf complex ion formationDonnan equilibriumCv and CpHeat engines and Heat pumpsPiston entropyEntropy changesStatesHess's lawEntropy pathPhase changesMixing entropyEntropy of the universeSystem and su
Binghamton - CHEM - 108
March 27, 2009 A + B + A+ + B Or A | A+ # B+|B For both B product metalEreaction = EBo - EAoA reactant metal Reference electrode 2H+ + 2e H2E=0 Pt|H2(g)|H+ To measure reduction potentials, place onright sideStandard Potential for Zn2+ + 2e Z
Binghamton - CHEM - 108
March 30, 2009 electrode metal ion with higher charge itwill receive electron(s)Fe3+ + 1e Fe2+0.77Fe2+ (lower charge) is like metalFe2+ Non metalsSee from table Fe3+ + e Fe2+ + e E = 0.77 Zn2+ + 2e Zn E = -0.76 Fe2+ + Zn2+ Fe3+ + Zn (unbalanced
Binghamton - CHEM - 108
Monday, February 23, 2009 1M Ac- in flask Add 0.25M H+ Ac- + H+ HACH+ absorbed strongly 1- 0.250+ 0.25 Kc = 10-6 = cfw_[H+][Ac-]/[HAc] = [H+]cfw_[Ac-]/[HAc] = [H+] cfw_0.75/.25 [H+]3[H+] = 1/3 x10-6 0.25M acid in but [H+] changes in 10-6 range
Binghamton - CHEM - 108
Chapter 18Thermodynamics and EquilibriumThermodynamics Thermodynamics: study of relationshipbetween heat and other forms of energy in achemical or physical process. Enthalpy, H, introduced in Chapter 6. Change in enthalpy equals the heat of reactio
University of Houston-Victoria - MGMT - 4340
Safety First. No one gets hurt on our shift today.Presented by:Erum SyedMirza EhteshamNapacha SuttitumSantid PanichapongOverviewSafety First. No one gets hurt on our shift today.External AnalysisGeneral Environment AnalysisDriving ForcesPorters
University of Houston-Victoria - MGMT - 4340
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University of Houston-Victoria - MGMT - 4340
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University of Houston-Victoria - MGMT - 4340
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University of Houston-Victoria - MGMT - 4340
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University of Houston-Victoria - MGMT - 4340
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