What is the main difference between symmetric and asymmetric cryptography?

Cryptography Concepts

Quiz
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Computers
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12th Grade
•
Medium
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The main difference is in the type of encryption algorithm used.
The main difference is in the speed of encryption and decryption.
The main difference is in the level of security provided.
The main difference is in the number of keys used for encryption and decryption.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do stream ciphers differ from block ciphers in terms of encryption?
Stream ciphers encrypt data in fixed-size blocks, while block ciphers encrypt data bit by bit
Stream ciphers encrypt data bit by bit or byte by byte, while block ciphers encrypt data in fixed-size blocks at a time.
Stream ciphers and block ciphers both encrypt data in a continuous stream
Block ciphers and stream ciphers both encrypt data in fixed-size blocks
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of a hash function in cryptography?
Hash functions are only used for compressing data in cryptography
The purpose of a hash function is to decrypt messages in cryptography
The purpose of a hash function in cryptography is to convert input data into a fixed-size string of bytes, used for data integrity verification, message authentication, and password storage.
A hash function in cryptography is used to encrypt data with a private key
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe the process of transposition in cryptography.
Transposition in cryptography involves rearranging the order of characters in a message according to a certain system or key. This process does not change the characters themselves but alters their positions.
Transposition involves changing the characters in a message to create an encrypted text.
Transposition is a process of converting text into a different language.
Transposition rearranges the words in a message alphabetically.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is substitution in the context of cryptography?
Substitution is a process of converting plaintext to ciphertext using a mathematical formula.
Substitution in cryptography involves replacing each letter in the plaintext with another letter or symbol based on a key or algorithm.
Substitution refers to the act of directly transmitting the plaintext without any encryption.
Substitution involves rearranging the order of letters in the plaintext without any key or algorithm.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain how a Ceasar Cipher works and provide an example of its implementation.
The Caesar Cipher works by reversing the order of letters in the plaintext
The Caesar Cipher works by shifting each letter in the plaintext by a fixed number of positions down or up the alphabet. For example, with a shift of 3, 'HELLO' would be encrypted as 'KHOOR'.
The Caesar Cipher works by doubling each letter in the plaintext
The Caesar Cipher works by substituting each letter in the plaintext with a random symbol
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of key length in symmetric cryptography?
Key length in symmetric cryptography determines the strength of encryption.
Key length in symmetric cryptography determines the speed of encryption
Shorter key lengths provide stronger encryption
Key length in symmetric cryptography is irrelevant
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