Question 1

An attack in which the user receives unwanted amount of e- mails.&#10;A)smurfing&#10;B)denial of service&#10;C)e-mail bombing&#10;D)ping storm

Accepted Answer

E-mail bombing refers to the attack where the user's email account is overwhelmed with a huge volume of unwanted emails, effectively disrupting normal usage.

Question 2

In same keys are implemented for encrypting as well as decrypting the information.&#10;A)symmetric key encryption&#10;B)asymmetric key encryption&#10;C)asymmetric key decryption&#10;D)hash-based key encryption

Accepted Answer

Symmetric key encryption uses the same key for both encryption and decryption, which differentiates it from asymmetric key encryption where different keys are used for encryption and decryption.

Question 3

The procedure to add bits to the last block is termed as&#10;A)decryption&#10;B)hashing&#10;C)tuning&#10;D)padding

Accepted Answer

The procedure to add bits to the last block to ensure it is of a certain size or to align it with a certain boundary is known as padding. This is commonly used in cryptographic processes to ensure blocks of data are the correct size for encryption algorithms.

Question 4

In asymmetric key cryptography, the private key is kept by&#10;A)sender&#10;B)receiver&#10;C)sender and receiver&#10;D)all the connected devices to the network

Accepted Answer

In asymmetric key cryptography, the private key is kept by the receiver to decrypt messages that have been encrypted with the corresponding public key.

Question 5

Cryptanalysis is used __________________________________________&#10;A)to find some insecurity in a cryptographic scheme&#10;B)to increase the speed&#10;C)to encrypt the data&#10;D)to make new ciphers

Accepted Answer

Cryptanalysis is the study of analyzing information systems to understand hidden aspects of the systems. It is primarily used to find weaknesses or insecurities in cryptographic schemes, allowing for the development of methods to break or evade the cryptography.

Question 6

Conventional cryptography is also known as or symmetric-key encryption.&#10;A)secret-key&#10;B)public key&#10;C)protected key&#10;D)primary key

Accepted Answer

Conventional cryptography is also known as secret-key encryption because the same key is used for both encryption and decryption.

Question 7

________________________________________________________is the art & science of cracking the cipher-text without knowing the key.&#10;A)cracking&#10;B)cryptanalysis&#10;C)cryptography&#10;D)crypto-hacking

Accepted Answer

Cryptanalysis is the branch of cryptography that involves analyzing and breaking ciphertexts, cryptographic protocols, and encryption algorithms without necessarily knowing the key used to encrypt the information.

Deck 3: Cryptography and Security: Part B