代做Secure Payment Method帮做Java编程

日期：2024-09-27 06:14

Q1.Secure Payment Method Integration (Marks 18)

Assume that Alice has an?E-Commerce Website where she sells different?electronic?bike.Initial?HTMLand?PHP?pages?of?Alice's?E-Commerce Website are provided in the CANVAS.Please?refer?to?the?following Figure-1.1 as?an?example?of the

Figure-1.1:Product List Page of Alice's Electronic Bike ShopWebsite

When a customer clicks the “BUY”button of an?item,the?customer?is forwarded?to?the?following Shopping Cart page (see Figure-1.2) showing the selected?items.Once the?user?clicks?the “CHECKOUT NOW” button,it ?should??go?to?the

Billing Information?page(see Figure-1.3).

Figure-1.2:Shopping Cart Page of Alice's E-Commerce Website

Figure-1.3:Shopping Cart Payment Page of Alice's Electronic Bike Shop Website

In?order to?increase?sales?of?her?E-Commerce Website,she wants?to?include?different?types?of?payment?options?such?as?PayPal,MasterCard,Visa,AmEx,Google?Pay,Apple?Pay,Alipay,etc.Pleaserefer?to?the?tutorials?on?integrating PayPal and Google Pay integrations?asexamples.

In?this?task,you?need?to?integrate at least four different payment options in?the?given?e-commerce?application,two?of?which should be?PayPal and Google?Pay.To fulfil the?requirements of this?task you?need?to?perform.?the?followings:

(a)Upload ?the ?final ?files ?(e.g.,HTML,PHP,and??JavaScript.?files)as??attachment??in??the??CANVAS??along??with??your?assignment submission.

(b)In ?the ?assignment ?solution,provide ?step-by-step ?guidelines ?of ?integrating ?the ?selected ?four??payment??options???with?appropriate?codes?and?screenshot?of?your?output?pages.You must demo the solution ofthis question to your tutor as a group.Date and time of demo will be announcedseparately.No demo,no marks.Please ?note?that you do not need?to?provide?any?video?of the?demonstration.

Q2.Multi-Signature (Marks:10)

Imagine?Alice,Bob,and ?Karen ?share ?a ?business.They ?have ?decided ?that?whenever?they ?purchase ?something ?for?the?business everyone must approve thetransaction.They have?made that?known?to?their?bank AusBank.The?bank?isaware?that a?check will?have signatures ofall for?it?to?be?valid.A?typical?blank?check?is?shown?below?(see Figure-2.1).

Figure-2.1:A typical blank check

(a) Scenario-1:Assume that Alice,Bob,and?Karenwant to?issue a?bank check of S100,000 in?favourof XYZ company.???To make it clear, XYZ isthe?payee,the?payable amount?is $100,000,and Alice,Bob,and?Karen?are?the?payers?of the?check.The name of payee and the?amount are?printed?on?the?check?as?shown?in Figure-2.2.The?checkmustbe

signed?by each?payer.Each?payer hasa?public and?private?keypair that?is generated using?a?Public-Key

cryptosystem.Each payer will sign the message“100000”with theirrespective private?key?and?generate?a?digital?signature for the message.Bank knows the public?keys?of each?payer.You?arerequired to?perform.?the?following???tasks:

i. ????For?each ?payer,show ?detail ?computations?of?each?step?for?generating?digital?signatures?for?the?above?message ?(M ?=100000)using ?suitable??key??parameters??(i.e.,you ?are??allowed??to??choose??the??requirec?parameters by yourown).

ii. ???Assume?three?digital?signatures?will?be?embedded?somewhere?on?the?blank?space?of the?check?as?shown?ir?Figure-2.2.?Show?how the bank will verify the signatures before deciding?to?accept/reject?the?digital?check?Detail computations mustbe?shown.

Figure-2.2:The bank check with payee name and amount containing digital signatures ofpayers:Alice, Bob,and Karen

(b) Scenario-2: With?the?situation?mentioned?in Scenario-1 (see Q2(a) ,Bankis?worried?that?they?have?to?verify?three?signaturesseparatelyeverytime?a?check?comes?from?payers?(i.e.,Alice,Bob,and?Charlie).In?order?to?reduce computational?burden,Bank wants to verify just?one?signature.Payers?are?alsoeager to?combine?three?signatures?intoone as shown?in Figure-2.3. How?can this?be accomplished with?multi-signature?Explain?the?process?and show detailed computations of each step.

To?illustrate?the?process?(Signing?and?verification?of?payment?message?using?Multi-Signature)and?show?detailed?computations?of?each?step,a?diagram?should?be?used.This?diagram?should?include?all?the?necessary?information??that?applies to the?process?as well?as the?calculations that?are?required.This?demonstrates?a?visual?representation??of?the?process?and?provides?a?way?to?easily?track?every?step.The?process?should?be?identified?and?broken?down?into?each?component,and?mathematical?calculations?should?be?provided?for?each?part?as?a?means?of?determining?the?results.Having?this?information?presented?in?a?clear?and?concise?manner?can?help?to?understand?the?process?more?effectively.

Figure-2.3:The bank check with payee nameand amountcontaining Multi-Signatures of payers:Alice,Bob,and Karen

Q3.Designing Reliable E-Commerce Systems (Marks 5)

An?E-commerce?company?is?setting?up?online?business.They?are?expecting?lots?of?clients?to?visit?their?website?at?the?same?time?for?purchasing?items?online.The?company?understands?that?the“n-tier?architecture”is?an?industry-proven?software?architecture?model.The?architecture?model?is?suitable?to?support?enterprise?level?client-serverapplications?by??providing?solutions?to?scalability,security,fault?tolerance,reusability,and ?maintainability.It ?helps ?developers ?to ?create?flexible and reusable?applications.

Based?on?the?above?understanding,the?company?has?decided?to?build?a 3-tier robust?E-commerce?site?as?shown?in Figure-3 to ?handle ?large ?number ?of ?e-transactions.The ?first ?tier,called ?web-server ?cluster,consists ?of ?a ?number ?of?web-servers?as?application front-end.The?second tier?is?known?as?application-server cluster and?the?third?tier?is?named

as database-server cluster.Similar to the first tier,both second and third tiers have a number of servers.Having multiple

servers in every tier,offers higher reliabilityto the?tier?itself?and?to?the?overall?multi-tier?E-commerce?system.

Figure-3:Three-tier E-Commerce System

However,company?is?running?short?of?cash,and?can?only?afford?to?buy?old?computers?having?only 75%(i.e.,0.75) reliability.Despite ??this,the ??company ???is ??determined ???to ??build ???a ??web-server ??cluster???with 99.999% reliability,

application-server cluster with 99.99% reliability,and?database-server?cluster?with 99.9% reliability.Based ?on ?the?requirement of the company,you need to determine the followings?by showing?detail?computations:

a)How many serverswould be?required for different?clusters?

b)What?would?be?overall?reliabilityof?the 3-tier E-commerce system?

Q4.Secure Identification in E-Commerce Application (Marks 7)

Assume a real-lifelike scenario where Alice goes to wonderland for shopping and?having fun.Usually,she?caries?a?debit?card?issued by XYZ bank and withdraws cash from ATM to?purchase?something.There?are?plenty?of XYZ?banks?and ATM?machines?in wonderland.One day,while she was?in a?shopping?mall,she?realizes?that?her wallet?is?no?longer?in?the?pocket ofher?jacket.She has lost not only?herATM?card?but?also?all?the?ID?cards.So,going?to?the?bank?and?showing?her?ID card to?prove?her identity?is?not?an option.The only thingshe?has?is?her?mobile?phone whichcan?perform.?large?mod?calculation.She is embarrassed and disappointed.

She then?remembers the advice given?by the?bank when she?is?in a difficult?situation?like?this.The?bank?advised?her?to?go?to any branch office ofXYZ and?prove to them?that?she?knows?a?secret without?revealing?the?secret.They?explained?her?the?protocol.So,Alice goes to a branch office of XYZ and talks?to?branch?officer?Bob?to?prove?that?she?knows?a?secret?without?revealing?it.

How can the?bank facilitate this with?help of zero-knowledge-proof?(ZKP)protocol?Assume?bank?is the?trusted?third?party(TTP)deploying zero-knowledge-proof (ZKP)protocol,Alice is the prover and?Bob?is the verifier.Show?all?the?steps?in?details?and?sequence?diagram?to?illustrate?how?Alice?convinces?Bob.Also,show?what?the?bank?must?prepare?in?advance to facilitate this.

Q4.Secure ??Identification ???in ???E-Commerce ??Application ???(Marks ???7)

Assume a real-lifelike scenario where Alice goes to wonderlandfor shopping and?having fun.Usually,she?carries?a?debit?card?issued by XYZ bank and withdraws cash from ATM to?purchase?something.There?are?plenty?of XYZ?banks?and ATM??machines?in wonderland.One day,while she was?in a shopping?mall,she realizes that?her wallet?is?no?longer?in the?pocket of her?jacket.She has lost not?only?herATM?card?butalsoall?the?ID?cards.So,going?to?the?bank?and?showing?her??ID card to?prove?her identityis?not an option.The only thingshe?has?is?her?mobile?phonewhichcan?perform.?large?mod??calculation.She is embarrassed and disappointed

She then?remembers theadvice given?bythe?bank when she?is?in a difficult situation?like this.The?bank?advised?her to?go?to any branch office of XYZ and prove?to?them?that?she?knows?a?secret without?revealing?the?secret.They?explained?her?the?protocol.So,Alice goes to a branch office of XYZ and?talks?to?branch?officer?Bob?to?prove?that?she?knows?a?secret?without revealing?it.

How can the bank facilitate this with help of zero-knowledge-proof?(ZKP)protocol?Assume?bank?is?the?trusted?third?party(TTP)deploying zero-knowledge-proof (ZKP)protocol,Alice is the prover and?Bob?isthe verifier.Show?all thesteps?in?details?and?sequence?diagram to?ilustrate?how Alice?convinces?Bob.Also,show what the?bank?must?prepare?in?advance to facilitate this.