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E-commerce security is the protection of e-commerce assets from unauthorized access, use, alteration, or destruction.
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6 dimensions of e-commerce security 
1.     Integrity: prevention against unauthorized data modification
2.     Nonrepudiation: prevention against any one party from reneging on an agreement after the fact
3.     Authenticity: authentication of data source
4.     Confidentiality: protection against unauthorized data disclosure
5.     Privacy: provision of data control and disclosure
6.     Availability: prevention against data delays or removal

 

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Integrity: prevention against unauthorized data modification Nonrepudiation: prevention against any one party from reneging on an agreement after the fact Authenticity: authentication of data source Confidentiality: protection against unauthorized data disclosure

A procedure that recognizes, reduces, or eliminates a threat 1. Intellectual property protection – Legislature – Authentication 2. Client computer protection – Privacy -- Cookie blockers; Anonymizer – Digital certificate (Figure 5.9) – Browser protection – Antivirus software – Computer forensics expert 3. Communication channel protection – Encryption

1. Integrity: prevention against unauthorized data modification 2. Nonrepudiation: prevention against any one party from reneging on an agreement after the fact 3. Authenticity: authentication of data source 4. Confidentiality: protection against unauthorized data disclosure 5. Privacy: provision of data control and disclosure 6. Availability: prevention against data delays or removal

Dear Friend > E-commerce security To achieve highest degree of security New technologies Organizational policies and procedures Industry standards and government laws Other factors Time value of money Cost of security vs. potential loss Security often breaks at weakest . It is a procedure that followed by entity and others so secure every thing related to them and e-commerce. Thanks

**E-COMMERCE SECURITY** E-commerce security is the protection of e-commerce assets from unauthorized access, use, alteration, or destruction. It can be measured on the following dimensions. – Integrity : Prevention against unauthorized data modification – Authenticity : Authentication of data source – Confidentiality : Protection against unauthorized data disclosure – Privacy : Provision of data control and disclosure – Availability : Prevention against data delays or removal – Non-repudiation : Prevention against any party from reneging on an agreement after the fact Thanks

E-commerce security is the protection of e-commerce assets from unauthorized access, use, alteration, or destruction. 6 dimensions of e-commerce security (Table 5.1) 1. Integrity: prevention against unauthorized data modification 2. Nonrepudiation: prevention against any one party from reneging on an agreement after the fact 3. Authenticity: authentication of data source 4. Confidentiality: protection against unauthorized data disclosure 5. Privacy: provision of data control and disclosure 6. Availability: prevention against data delays or removal E-COMMERCE THREATS (Figure 5.4) Threats: anyone with the capability, technology, opportunity, and intent to do harm.Potential threats can be foreign or domestic, internal or external, state-sponsored or a single rogue element.Terrorists, insiders, disgruntled employees, and hackers are included in this profile (President's Commission on Critical Infrastructure Protection) Concern 2001 2000 Loss of Privacy/confidentiality, data misuse/abuse 28% 25% Cracking, eavesdropping, spoofing, rootkits 25% 20% Viruses, Trojans, worms, hostile ActiveX and Java 21% 26% System unavailability, denial of service, natural disasters, power interruptions 18% 20% 2001 Information Security Industry Survey 1. Intellectual property threats -- use existing materials found on the Internet without the owner's permission, e.g., music downloading, domain name (cybersquatting), software pirating 2. Client computer threats – Trojan horse – Active contents – Viruses 3. Communication channel threats – Sniffer program – Backdoor – Spoofing – Denial-of-service 4. Server threats – Privilege setting – Server Side Include (SSI), Common Gateway Interface (CGI) – File transfer – Spamming COUNTERMEASURE (Figure 5.5) A procedure that recognizes, reduces, or eliminates a threat 1. Intellectual property protection – Legislature – Authentication 2. Client computer protection – Privacy -- Cookie blockers; Anonymizer – Digital certificate (Figure 5.9) – Browser protection – Antivirus software – Computer forensics expert 3. Communication channel protection – Encryption * Public-key encryption (asymmetric) vs Private-key encryption (symmetric) (Figure 5-6) * Encryption standard: Data Encryption Standard (DES), Advanced Encryption Standard (AES) – Protocol * Secure Sockets Layer (SSL) (Figure 5.10) * Secure HyperText Transfer Protocol (S-HTTP) – Digital signature (Figure 5-7) Bind the message originator with the exact contents of the message –A hash function is used to transform messages into a 128-bit digest (message digest). –The sender’s private key is used to encrypt the message digest (digital signature) –The message + signature are sent to the receiver –The recipient uses the hash function to recalculate the message digest –The sender’s public key is used to decrypt the message digest –Check to see if the recalculated message digest = decrypted message digest 4. Server protection – Access control and authentication * Digital signature from user * Username and password * Access control list – Firewalls (Figure 5.11) International Computer Security Association's classification: · Packet filter firewall: checks IP address of incoming packet and rejects anything that does not match the list of trusted addresses (prone to IP spoofing) · Application level proxy server: examines the application used for each individual IP packet (e.g., HTTP, FTP) to verify its authenticity. · Stateful packet inspection: examines all parts of the IP packet to determine whether or not to accept or reject the requested communication. HOW TO MINIMIZE SECURITY THREATS (Figure 5.12) 1. Perform a risk assessment à a list of information assets and their value to the firm 2. Develop a security policy à a written statement on: * what assets to protect from whom? * why these assets are being protected? * who is responsible for what protection? * which behaviors are acceptable and unacceptable? 3. Develop an implementation plan à a set of action steps to achieve security goals 4. Create a security organization à a unit to administer the security policy 5. Perform a security audit à a routine review of access logs and evaluation of security procedures ELECTRONIC PAYMENT SYSTEMS A medium of payment between remote buyers and sellers in cyberspace: electronic cash, software wallets, smart cards, credit/debit cards. Offline payment methods Number of transactions: cash (42%), check (32%), credit card (18%) (Figure 6.1) Dollar amount: check(52%), credit card (21%), cash (17%) (Figure 6.2) Payment systems Properties Costs Advantages Disadvantages Electronic cash e.g., PayPal – 31% of US population do not have credit cards – micropayments (< $10) – Independent – Portable – Divisible – Internet cash transfer: no fixed cost of hardware – No distance costs – Small processing fee to banks – Efficient – Less costly – Money laundering – Forgery – Low acceptance – Multiple standards Electronic wallets e.g., Passport – Stores shipping & billing information – Encrypted digital certificate – Lengthy download for client-side wallets – Enter information into checkout forms automatically – Client-side wallets are not portable – Privacy issue for server-side wallets Smart cards e.g., Blue – Embedded microchip storing encrypted personal information – Time value of money – Convenience – Need a card reader – Card theft – Low acceptance Credit cards e.g., VeriSign – Line of credit – Purchase dispute protection – Secure Electronic Transaction (SET) Protocol – Unpaid balance charge – $50 limit on frauds – Processing fee – Most popular – Worldwide acceptance – Costly SECURITY REQUIREMENTS 1. Authentication of merchant and consumer 2. Confidentiality of data 3. Integrity of data 4. Non-repudiation SECURITY MEASURES 1. Secure Electronic Transaction (SET) protocol: developed jointly by MasterCard and Visa with the goal of providing a secure payment environment for the transmission of credit card data. Features SSL SET Encryption of data during transmission Yes Yes Confirmation of message integrity Yes Yes Authentication of merchant Yes Yes Authentication of consumer No Yes Transmission of specific data only on a "need know" basis No Yes Inclusion of bank or trusted third party in transaction No Yes No need for merchant to secure credit card data internally No Yes SET payment transaction: * A shopper makes a purchase and transmits encrypted billing information with his/her digital certificate to the merchant. * The merchant transfers the SET-coded transaction to a payment card-processing center. * The processing center decrypts the transaction. * A certification authority certifies the digital certificate as belonging to the shopper. * The processing center routes the transaction to the shopper's bank for approval. * The merchant receives notification from the shopper's bank that the transaction is approved. * The shopper's payment card account is charged for the transaction amount. * The merchant ships the merchandize and transmits the transaction amount to the merchant's bank for deposit. 2. Disposable credit numbers: one-time-use credit card numbers (private payment number) are transmitted to the merchant – Register with American Express or Discover – Download software (a Private Payment icon tray will be displayed on the screen) – Shop online – Click on the Private Payment icon – Log-in – Select the credit card to be used – View unique, one-time-use credit card number and expiration date – Enter the one-time-used credit card number and expiration date into merchant's standard form