 |
1 | |
In __________cryptography, the same key is used by the sender (for encryption) and the receiver (for decryption). |
| | A) | symmetric-key |
| | B) | asymmetric-key |
| | C) | public-key |
| | D) | None of the choices are correct |
|
|
2 | |
In _________ cryptography, the same key is used in both directions. |
| | A) | symmetric-key |
| | B) | asymmetric-key |
| | C) | public-key |
| | D) | None of the choices are correct |
|
|
3 | |
_________ cryptography is often used for long messages. |
| | A) | Symmetric-key |
| | B) | Asymmetric-key |
| | C) | public-key |
| | D) | None of the choices are correct |
|
|
4 | |
___________ cryptography is often used for short messages. |
| | A) | Symmetric-key |
| | B) | Asymmetric-key |
| | C) | Secret-key |
| | D) | None of the choices are correct |
|
|
5 | |
__________means that the sender and the receiver expect confidentiality. |
| | A) | Non-repudiation |
| | B) | Integrity |
| | C) | Authentication |
| | D) | None of the choices are correct |
|
|
6 | |
___________ means that the data must arrive at the receiver exactly as they were sent. |
| | A) | Non-repudiation |
| | B) | Message integrity |
| | C) | Authentication |
| | D) | None of the choices are correct |
|
|
7 | |
______________ means that the receiver needs to be sure of the sender identity and that an imposter has not sent the message. |
| | A) | Non-repudiation |
| | B) | Message integrity |
| | C) | Message authentication |
| | D) | None of the choices are correct |
|
|
8 | |
______________ can provide authentication, integrity, and nonrepudiation for a message. |
| | A) | Encryption/decryption |
| | B) | Digital signature |
| | C) | Compression |
| | D) | None of the choices are correct |
|
|
9 | |
Digital signature does not provide _________. |
| | A) | non-repudiation |
| | B) | privacy |
| | C) | authentication |
| | D) | provides all of the above |
|
|
10 | |
In ___________, the entity identity is verified once for the entire duration of system access. |
| | A) | entity authentication |
| | B) | message integrity |
| | C) | message authentication |
| | D) | None of the choices are correct |
|
|
11 | |
In __________ cryptography, everyone has access to everyone's public key. |
| | A) | symmetric-key |
| | B) | asymmetric-key |
| | C) | secret-key |
| | D) | None of the choices are correct |
|
|
12 | |
After a message is encrypted, it is called _______. |
| | A) | plaintext |
| | B) | ciphertext |
| | C) | cryptotext |
| | D) | None of the choices are correct |
|
|
13 | |
If 20 people need to communicate using symmetric-key cryptography, _______ symmetric keys are needed. |
| | A) | 19 |
| | B) | 20 |
| | C) | 190 |
| | D) | 200 |
|
|
14 | |
In the asymmetric-key method of cryptography, which key is publicly known? |
| | A) | encryption key only |
| | B) | decryption key only |
| | C) | both keys |
| | D) | None of the choices are correct |
|
|
15 | |
In the asymmetric-key method of cryptography, the receiver has possession of the _______. |
| | A) | private key |
| | B) | public key |
| | C) | none of the keys |
| | D) | None of the choices are correct |
|
|
16 | |
The RSA algorithm uses _______ cryptography method. |
| | A) | an asymmetric-key |
| | B) | a private-key |
| | C) | a symmetric-key |
| | D) | None of the choices are correct |
|
|
17 | |
If user A wants to send an encrypted message to user B, the plaintext is encrypted with the public key of _______. |
| | A) | user A |
| | B) | user B |
| | C) | the network |
| | D) | None of the choices are correct |
|
|
18 | |
In the digital signature technique when the whole message is signed using an asymmetric key, the sender of the message uses _______ to sign the message. |
| | A) | his or her own symmetric key |
| | B) | his or her own private key |
| | C) | his or her own public key |
| | D) | None of the choices are correct |
|
|
19 | |
In the digital signature technique when the whole message is signed using an asymmetric key, the receiver of the message uses _______ to verify the signature. |
| | A) | her or his own symmetric key |
| | B) | her or his own private key |
| | C) | the sender's public key |
| | D) | None of the choices are correct |
|
|
20 | |
A _______ is a trusted third party that solves the problem of symmetric-key distribution. |
| | A) | CA |
| | B) | KDC |
| | C) | TLS |
| | D) | firewall |
|
|
21 | |
A _______ certifies the binding between a public key and its owner. |
| | A) | CA |
| | B) | KDC |
| | C) | TLS |
| | D) | None of the choices are correct |
|
2010 McGraw-Hill Higher Education