Description : Encryption can be done A. only on textual data B. only on ASCII coded data C. on any bit string D. only on mnemonic data
Last Answer : C. on any bit string
Description : A digital signature is a. a bit string giving identity of a correspondent b. a unique identification of a sender c. an authentication of an electronic record by tying it uniquely to a key only a sender knows d. an encrypted signature of a sender
Last Answer : c. an authentication of an electronic record by tying it uniquely to a key only a sender knows
Description : Public key encryption method is a system a. which uses a set of public keys one for each participant in e-Commerce b. in which each person who wants to communicate has two keys; a private key known to him ... him. c. which uses the RSA coding system. d. which is a standard for use in e-Commerce.
Last Answer : b. in which each person who wants to communicate has two keys; a private key known to him only and a public key which is publicized to enable others to send message to him.
Description : By symmetric key encryption we mean a. one private key is used for both encryption and decryption b. private and public key used are symmetric c. only public keys are used for encryption d. only symmetric key is used for encryption
Last Answer : D
Description : While sending a signed message, a sender a. sends message key using public key encryption using DES and hashed message using public key encryption b. sends message using public key encryption ... and hashed message using DES d. sends both message and hashed message using public key encryption
Last Answer : a. sends message key using public key encryption using DES and hashed message using public key encryption
Description : In public key encryption system if A encrypts a message using his private key and sends it to B a. if B knows it is from A he can decrypt it using A's public key b. Even if B knows who sent the ... be decrypted at all as no one knows A's private key d. A should send his public key with the message
Last Answer : a. if B knows it is from A he can decrypt it using A’s public key
Description : In public key encryption if A wants to send an encrypted message a. A encrypts message using his private key b. A encrypts message using B’s private key c. A encrypts message using B’s public key d. A encrypts message using his public key
Last Answer : c. A encrypts message using B’s public key
Description : Triple DES a. is a symmetric key encryption method b. guarantees excellent security c. is implementable as a hardware VLSI chip d. is public key encryption method with three keys.
Last Answer : b. guarantees excellent security
Description : DES (i) is a symmetric key encryption method (ii)guarantees absolute security (iii) is implementable as hardware VLSI chip (iv) is a public key encryption method a. i and ii b. ii and iii c. i and iii d. iii and iv
Last Answer : c. i and iii
Description : The acronym DES stands for a. Digital Evaluation System b. Digital Encryption Standard c. Digital Encryption System d. Double Encryption Standard
Last Answer : b. Digital Encryption Standard
Description : Encryption is required to (i) protect business information from eavesdropping when it is transmitted on internet (ii)efficiently use the bandwidth available in PSTN (iii) to protect information stored in companies' databases from ... a. i and ii b. ii and iii c. iii and iv d. i and iv
Last Answer : d. i and iv
Description : By encryption of a text we mean a. compressing it b. expanding it c. scrambling it to preserve its security d. hashing it
Last Answer : c. scrambling it to preserve its security
Description : DES using 56 bit keys a. Cannot be broken in reasonable time using presently available computers b. Can be broken only if the algorithm is known using even slow computers. c. Can be broken with presently available high performance computers. d. It is impossible to break ever.
Last Answer : c. Can be broken with presently available high performance computers.
Description : DES works by using a. permutation and substitution on 64 bit blocks of plain text b. only permutations on blocks of 128 bits c. exclusive ORing key bits with 64 bit blocks d. 4 rounds of substitution on 64 bit blocks with 56 bit keys
Last Answer : a. permutation and substitution on 64 bit blocks of plain text
Description : Triple DES uses a. 168 bit keys on 64-bit blocks of plain text b. Working on 64-bit blocks of plain text and 56 bit keys by applying DES algorithm for three rounds. c. Works with 144 bit ... algorithm once. d. Uses 128 bit blocks of plain text and 112 bit keys and apply DES algorithm thrice.
Last Answer : b. Working on 64-bit blocks of plain text and 56 bit keys by applying DES algorithm for three rounds.
Description : ASCII and EBCDIC are the popular character coding systems. What does EBCDIC stand for? A) Extended Binary Coded Decimal Interchange Code B) Extended Bit Code Decimal Interchange Code C) Extended Bit Case Decimal Interchange Code D) Extended Binary Case Decimal Interchange Code
Last Answer : Answer : A
Description : EDI use a. requires an extranet b. requires value added network c. can be done on internet d. requires a corporate intranet
Last Answer : c. can be done on internet
Description : Advantages of B2C commerce to customers are (i)wide variety of goods can be accessed and comparative prices can be found (ii) shopping can be done at any time (iii)privacy of transactions can be guaranteed (iv) ... be guaranteed a. i and ii b. ii and iii c. iii and iv d. i and iv
Last Answer : a. i and ii
Description : By security in e-Commerce we mean (i) Protecting an organization's data resource from unauthorized access (ii)Preventing disasters from happening (iii) Authenticating messages received by an organization (iv) Protecting messages sent on ... a. i, ii b. ii, iii c. iii, iv d. i, iii, iv
Last Answer : It's D
Description : In B2B e-Commerce (i) Co-operating Business should give an EDI standard to be used (ii) Programs must be developed to translate EDI forms to a form accepted by application program (iii) Method of transmitting/receiving data should be ... . i, ii b. i, ii, iii c. i, ii, iii, iv d. ii, iii, iv
Last Answer : b. i, ii, iii
Description : EDI requires a. representation of common business documents in computer readable forms b. data entry operators by receivers c. special value added networks d. special hardware at co-operating Business premises
Last Answer : a. representation of common business documents in computer readable forms
Description : Electronic Data Interchange is necessary in a. B2C e-Commerce b. C2C e-Commerce c. B2B e-Commerce d. Commerce using internet
Last Answer : c. B2B e-Commerce
Description : For carrying out C2C e-Commerce the following infrastructure is essential (i) World Wide Web (ii) Corporate network (iii) Electronic Data Interchange standards (iv) Secure Payment Services (v)Secure electronic communication link ... a. i and ii b. ii and iv c. i and iii d. i and iv
Description : For carrying out B2C e-Commerce the following infrastructure is essential (i) World Wide Web (ii) Corporate network (iii) Electronic Data Interchange standards (iv) Secure Payment Services (v) Secure electronic communication link ... . i, iv b. i, iii, iv c. ii, iii d. i, ii, iii, iv
Last Answer : a. i, iv
Description : For carrying out B2B e-Commerce the following infrastructure is essential: (i) World Wide Web (ii) Corporate network (iii) Electronic Data Interchange standards (iv) Secure Payment Services (v)Secure electronic communication link ... . ii, iii, iv c. ii, iii, iv, v d. i, ii, iii, iv, v
Last Answer : c. ii, iii, iv, v
Description : In NetBill's protocol for small payments for internet services (i) Key to decrypt information is sent to customer by NetBill only when there is enough amount in debit account (ii) The vendor supplies the key to NetBill server when he ... i, ii b. i, ii, iii c. i, ii, iii, iv d. i, ii, iv
Description : In the NetBill's protocol for small payments for services available in the internet. (i) the customer is charged only when the information is delivered (ii)the vendor is guaranteed payment when information is delivered (iii) the customer ... , ii b. i, ii, iii c. i, ii, iii, iv d. i, ii, iv
Last Answer : d. i, ii, iv
Description : ripple DES a. Cannot be broken in reasonable time using presently available computers. b. Can be broken only if the algorithm is known using even slow computer. c. Can be broken with presently available high performance computers. d. It is impossible to break ever.
Last Answer : a. Cannot be broken in reasonable time using presently available computers.
Description : Proxy application gateway (i) acts on behalf of all intranet users wanting to access interne securely (ii)monitors all accesses to internet and allows access to only specified IP addresses (iii) disallows use of certain protocols with ... ii b. i, ii, iii c. i, ii, iii, iv d. ii, iii, iv
Description : Firewall as part of a router program a. filters only packets coming from internet b. filters only packets going to internet c. filters packets travelling from and to the intranet from the internet d. ensures rapid traffic of packets for speedy e-Commerce
Last Answer : c. filters packets travelling from and to the intranet from the internet
Description : EDI standard a. is not easily available b. defines several hundred transaction sets for various business forms c. is not popular d. defines only a transmission protocol
Last Answer : b. defines several hundred transaction sets for various business forms
Description : B2C commerce a. includes services such as legal advice b. means only shopping for physical goods c. means only customers should approach customers to sell d. means only customers should approach business to buy
Last Answer : a. includes services such as legal advice
Description : In Electronic cash payment (i) a customer withdraws “coins” in various denominations signed by the bank (ii)the bank has a database of issued coins (iii) the bank has a database of spent coins (iv) the bank cannot trace a customer a. i, ii b. i, ii, iii c. i, ii, iii, iv d. ii, iii, iv
Description : In Electronic cash payment a. a debit card payment system is used b. a customer buys several electronic coins which are digitally signed by coin issuing bank c. a credit card payment system is used d. RSA cryptography is used in the transactions
Last Answer : b. a customer buys several electronic coins which are digitally signed by coin issuing bank
Description : In cheque payment protocol, the purchase order form is signed by purchaser using a. his public key b. his private key c. his private key using his signature hardware d. various public keys
Last Answer : c. his private key using his signature hardware
Description : In electronic cheque payments developed, it is assumed that most of the transactions will be a. customers to customers b. customers to business c. business to business d. banks to banks
Last Answer : c. business to business
Description : The bank has to have the public keys of all customers in SET protocol as it has to a. check the digital signature of customers b. communicate with merchants c. communicate with merchants credit card company d. certify their keys
Last Answer : a. check the digital signature of customers
Description : One of the problems with using SET protocol is a. the merchant's risk is high as he accepts encrypted credit card b. the credit card company should check digital signature c. the bank has to ... of all customers d. the bank has to keep a database of digital signatures of all customers
Last Answer : c. the bank has to keep a database of the public keys of all customers
Description : In SET protocol a customer sends a purchase order a. encrypted with his public key b. in plain text form c. encrypted using Bank’s public key d. using digital Signature system
Last Answer : d. using digital Signature system
Description : In SET protocol a customer encrypts credit card number using a. his private key b. bank’s public key c. bank’s private key d. merchant’s public key
Last Answer : b. bank’s public key
Description : The Secure Electronic Transaction protocol is used for a. credit card payment b. cheque payment c. electronic cash payments d. payment of small amounts for internet services
Last Answer : a. credit card payment
Description : Certification of Digital signature by an independent authority is needed because a. it is safe b. it gives confidence to a business c. the authority checks and assures customers that the public ... business which claims its ownership d. private key claimed by a sender may not be actually his
Last Answer : c. the authority checks and assures customers that the public key indeed belongs to the business which claims its ownership
Description : The responsibility of a certification authority for digital signature is to authenticate the a. hash function used b. private keys of subscribers c. public keys of subscribers d. key used in DES
Last Answer : c. public keys of subscribers
Description : Hashed message is signed by a sender using a. his public key b. his private key c. receiver’s public key d. receiver’s private key
Last Answer : b. his private key
Description : A hashing function for digital signature (i) must give a hashed message which is shorter than the original message (ii)must be hardware implementable (iii) two different messages should not give the same hashed message (iv) ... signature a. i and ii b. ii and iii c. i and iii d. iii and iv
Description : A digital signature is required (i) to tie an electronic message to the sender's identity (ii)for non repudiation of communication by a sender (iii) to prove that a message was sent by the sender in a court of law (iv) in all ... a. i and ii b. i, ii, iii c. i, ii, iii, iv d. ii, iii, iv
Description : DES and public key algorithm are combined (i) to speed up encrypted message transmission (ii)to ensure higher security by using different key for each transmission (iii) as a combination is always better than individual system (iv ... e-Commerce a. i and ii b. ii and iii c. iii and iv d. i and iv
Description : Message can be sent more securely using DES by a. encrypting plain text by a different randomly selected key for each transmission b. encrypting plain text by a different random key for each ... instead of using hardware d. designing DES with high security and not publicizing algorithm used by it
Last Answer : b. encrypting plain text by a different random key for each message transmission and sending the key to the receiver using a public key system
Description : Public key system is useful because a. it uses two keys. b. there is no key distribution problem as public key can be kept in a commonly accessible database. c. private key can be kept secret. d. it is a symmetric key system.
Last Answer : b. there is no key distribution problem as public key can be kept in a commonly accessible database.
Description : A hardened firewall host on an Intranet is a. a software which runs in any of the computers in the intranet b. a software which runs on a special reserved computer on the intranet c. a stripped down computer connected to the intranet d. a mainframe connected to the intranet to ensure security
Last Answer : b. a software which runs on a special reserved computer on the intranet