The process of decryption of an AES ciphertext is similar to the encryption process in the ______.
Reverse order
Next order
Both A and B
All of the mentioned above
Correct Answer :
A. Reverse order
The process of decrypting an AES ciphertext is quite similar to the process of encrypting it, except that it is done in the opposite order. Each round is comprised of the four processes, which are carried out in the opposite sequence of the previous round. Due to the fact that sub-processes in each round are carried out in reverse order, as opposed to a Feistel Cipher, the encryption and decryption algorithms must be developed separately, despite the fact that they are extremely closely connected.
Related Questions
Which of the following are used to create a message digest by the network security protocols?
RSA
SHA-1
DES
MD5
With reference to Cipher Feedback (CFB) Mode, amongst which of the following is /are true,
Each ciphertext block gets 'fed back' into the encryption process
Encrypt the next plaintext block
Both A and B
None of the mentioned above
Encryption algorithms are divided into two categories based on the ______.
Output type
Input type
Process type
All of the mentioned above
A hash function is a _____ that converts a numerical input value into another compressed numerical value.
Abstract view
Mathematical function
Both A and B
None of the mentioned above
Conventional cryptography also known as ... encryption.
asymmetric-key
logical-key
symmetric-key
None of these
Cipher in cryptography is
Encrypted message
Algorithm for performing encryption and decryption
Both algorithm for performing encryption and decryption and encrypted message
Decrypted message
Which of the following options correctly defines the Brute force attack?
Brutally forcing the user to share the useful information like pins and passwords.
Trying every possible key to decrypt the message.
One entity pretends to be some other entity
The message or information is modified before sending it to the receiver.
What is the full-form of RSA in the RSA encryption technique?
Round Security Algorithm
Rivest, Shamir, Adleman
Robert, Shamir, Addie
None of the above
Which of the following is the main disadvantage of the ECB (Electronic Code Book)?orWhich of the following is the major drawback of ECB?
It requires large block size
Padding is done to make the plain text divisible into blocks of fixed size
It is prone to cryptanalysis since there is a direct relationship between plain text and cipher text.
None of the above
In Cipher block chaining mode, the current plaintext block is added to the ____.
Previous ciphertext block
Next ciphertext block
Middle ciphertext block
None of the mentioned above
For which of the following should EBC (Electronic Code Book) process not be used for encryption?
For large block sizes
For fixed block sizes
For small block sizes
None of the above
The process of decryption of an AES ciphertext is similar to the encryption process in the ______.
Reverse order
Next order
Both A and B
All of the mentioned above
Security Goals of Cryptography are
Confidentiality
Authenticityn
Data integrityn
All of these
Which possible Attacks in Quantum Cryptography can take place?
Possible Attacks in Quantum Cryptography and Birthday Attack
Birthday attack and Boomerang attack
Brute force attack and Faked-State-Attack
Possible Attacks in Quantum Cryptography and Faked-State Attack
Which of the following security attacks is not an active attack? ORWhich of the following attacks is a passive attack?
Masquerade
Modification of message
Denial of service
Traffic analysis
Among the following given options, chose the strongest encryption technique?
DES ( Data Encryption Standard)
Double DES
Triple DES
AES (Advance Encryption Standard)
What does IDEA stand for in the world of cryptography?orThe IDEA word in the IDEA algorithm is the abbreviation for which of the following?
Independent Decryption Environment Analysis
International Defense Encryption Area
International Data Encryption Algorithm
None of the above
Which of the following options is not correct according to the definition of the Cipher Block Chaining (CBC)?
CBC is a mode of operation for stream ciphers.
Initialization vector (IV) is used in CBC in the initial phase.
It has better resistive nature towards cryptanalysis than ECB
None of the above
_____ and ______ protocol models can be extended to Entangled particles theory.
SARG04 and HTTP
FTP and SSP
SARG04 and SSP
HTTP and FTP
Which of the following is /are offered by the Hash functions?
Authentication
Non repudiation
Data Integrity
All of the above
Data encryption standard is a block cipher and encrypts data in blocks of size of _____ each.
16 bits
64 bits
32 bits
All of the mentioned above
What is the output of a cryptographic hash function means?
A variable set of bits
A fixed set of bits, derived from one-way mathematical operations
An output which may be easily discovered by an adversary
Outputs of such functions are of no importance
In the case of symmetric key encryption, the secret key that both the parties possess can be anything such as a _______.
Passcode or a password
Developed code
Network set
None of the mentioned above
Cipher block chaining or CBC is an advancement made on _____.
Electronic Code Book
Decrypted code
System engineering
All of the mentioned above
You are supposed to use hill cipher for encryption technique. You are provided with the following matrix,
Is the given matrix 'A', a valid key to be used for encryption?
Yes
No
Can't be determined
Data insufficient
The Hash Function takes an input of arbitrary length and converts it into a fixed length output.Which of the following names can we use for denoting the output of the hash function?
Hash value
Hash Code
Message Digest
All of the above
Codes and ciphers are different ways to _____ a message.
Encrypt
Decrypt
Both A and B
All of the mentioned above
Cipher Feedback Mode is given as feedback to the ____ of encryption with some new specifications.
Next block
Previous block
Middle block
All of the mentioned above
A cryptographic hash function is an equation used to verify the ____ of data.
Variety
Validity
Veracity
None of the mentioned above
Post-Quantum Cryptography is a classical cryptographic scheme that is conjectured to be secure against ____.
Quantum adversaries
Quantum integration
Quantum hash
None of the mentioned above