WorksheetsCryptographic fundamentals for IoT
Total questions: 15
Worksheet time: 8mins
In asymmetric key cryptography, the private key is kept by __________
Sender
Receiver
Sender & Receiver
All connected devices to the network
In cryptography, the order of the letters in a message is rearranged by __________
transpositional ciphers
Substitution cipher
Both transpositional and substitution ciphers
Quadratic ciphers
Cryptanalysis is used __________
to find some insecurity in a cryptographic scheme
to increase the speed
to encrypt the data
to make new ciphers
Cryptographic hash function takes an arbitrary block of data and returns _________
fixed size bit string
variable size bit string
both fixed size bit string and variable size bit string
variable sized byte string
An algorithm in encryption is called _____________
Cipher
Algorithm
Procedure
Module
In symmetric-key cryptography, the key locks and unlocks the box is
Different
Same
Private
Public
The keys used in cryptography are
Secret key
Private key
Public key
All
Which of the following is not a principle of data security?
Data Confidentiality
Data Integrity
Authentication
None of the above
Which of the following security attacks is not an active attack?
Masquerade
Modification of message
Denial of service
Traffic analysis
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.
Document is signed digitally using (a) key of sender.
How many types of keys are used for securing ZIGBEE network?
2
3
4
5
How many types of options are provided by Bluetooth LE for device association?
2
3
4
5
For higher level confidentiality and authentication services (a) is used in NFC.
The ________ is the message after transformation.
Ciphertext
plain text
secret text
None
