Perfect Computer Notes

Explain E-payment Security Schemes Following are the e-payment security schemes 1) Encryption 2) Certificates & Certificates Authority (CA) 3) Digital Signature 4) Digital Envelop 5) Message Digest 6) Transaction Certificates and Time Stamp (1) Encryption Encryption refers to changing a message into unreadable form. Later the encrypted message can be converted into readable form by Decryption. There are two types of Encryption (A) Secret Key Encryption/Private Key Encryption In this scheme, same key called secret key is used by sender and receiver for Encryption (Making message unreadable) & Decryption (Getting original message). Data Encryption Standards (DES) is the most widely used algorithm for secret key/private key encryption scheme. (B) Public Key Cryptography It is Also known as asymmetric Encryption. It uses two different keys (1) Private Key (2) Public Key. The receiver sends his public key to sender. The sender encrypts message with thi

Difference Between Debit Card and Credit Card:         Debit Card Credit Card 1.       Debit card id equal to your account value. 2.       It is an Asset 3.     To use a debit card customer should have      sufficient balance in his / her bank account.   4.       It is like a Prepaid system 5.      You cannot buy an item with price higher then your balance. 1.     When you use Credit Card. You are Actually borrowing money from bank/financial institution 2.      It is Liability 3.      To use a Credit card customer may not have sufficient balance. 4.      It is like a Postpaid system 5.     You can buy an item with price higher then your bank balance (upto your credit limit.) Basics of eCommerce Definition and History of ECommerce Role of E-Commerce in Daily Life Classification of e-Commerce Applications Difference Between Electronic Market and IOS Types Of e-Comm

Credit Card The Credit Card is plastic credit card with a magnetic strip issued by a bank or financial institution. Holders of a valid credit card have the authorization to purchase goods and services up to a predetermined amount, called a credit limit. Explain Advantages and Disadvantages of Credit Cards The vendor receives essential credit card information from the cardholder, the bank issuing the card actually repays the vendor, and eventually the cardholder repays the bank through regular monthly payments. If the entire balance is not paid in full, the credit card issuer can legally charge interest fees on the unpaid portion. Benefits of Credit Cards to customers 1.  Convenience The main benefit to each customer is convenience as carrying a credit card eliminates the need to carry any cash for most purposes. 2. Credit card allows small short-term loans Compared to debit cards and checks, a credit card allows small short-term loans to be quickly made to a custom