Crypto-All around

What is the primary focus of authentication ?

• Verifying identity

• Granting access

• Assigning permissions

• Ensuring confidentiality

Which of the following best describes authorization ?

• Verifying identity

• Granting access

• Ensuring confidentiality

• Assigning permissions

What is a suitable example of authentication ?

• A system encrypting sensitive data

• A user accessing a restricted file

• A system assigning specific roles to users

• A user entering a password

Which of the following scenarios best represents authorization ?

• Verifying a user's identity through biometrics

• Allowing a user to read and write files in a specific directory

• Encrypting communication between two parties

• Verifying the integrity of a digital signature

In symmetric key encryption (Example : Caesar Cipher), how many keys are used for both encryption and decryption ?

• 1

• 2

• 3

• 4

What distinguishes asymmetric key encryption from symmetric key encryption ?

• Use of multiple keys for encryption and decryption

• Use of variable key lengths for encryption and decryption

• Use of different keys for encryption and decryption

• Use of the same key for encryption and decryption

What is a characteristic of symmetric key encryption ?

• More computationally intensive

• Enables perfect forward secrecy

• Suitable for public-key infrastructure

• Requires key distribution

Which statement accurately describes an aspect of asymmetric key encryption ?

• It is more susceptible to brute-force attacks than symmetric key encryption

• It eliminates the need for secure key exchange

• It is generally faster in terms of computation

• It provides a one-to-one relationship between public and private keys

What does substitution achieve in cryptography ?

• Reordering characters

• Replacing characters

• Permuting characters

• Shuffling characters

How does transposition differ from substitution ?

• It replaces characters with others

• It reorders characters without replacing them

• It shuffles characters randomly

• It eliminates characters from the plaintext