Visual Cryptography: Encryption and Decryption

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What is another name for asymmetric key encryption?

Public key encryption (correct)

Visual encryption

Symmetric key encryption

Private key encryption

In visual cryptography, how is a secret binary image encrypted?

It is encrypted as a single image on a single transparency sheet

It is encrypted as a grayscale image for better security

It is encrypted as 2 binary images on separate transparency sheets (correct)

It is encrypted as a colored image for visual appeal

What does a public key in asymmetric key encryption refer to?

An encrypted key

A secret key

A temporary key

A widely distributed key (correct)

What is the primary purpose of visual cryptography?

To present decrypted messages as visual information (C) Signup and view all the answers

What is the significance of using large prime numbers in asymmetric key encryption?

To increase security by making it hard to factorize the keys (C) Signup and view all the answers

How does visual cryptography differ from conventional text-based encryption methods?

It presents decrypted messages as visual information (C) Signup and view all the answers

What is the main purpose of encryption?

To prevent unauthorized access to data (D) Signup and view all the answers

Which encryption technique uses the same key for both encryption and decryption?

Symmetric Key Encryption (B) Signup and view all the answers

What is the main vulnerability associated with Symmetric Key Encryption?

Key interception by attackers (C) Signup and view all the answers

Which encryption method is susceptible to interception due to the need for key distribution?

Symmetric Key Encryption (A) Signup and view all the answers

What kind of network encryption is WPA2 commonly used for?

Wireless network encryption (C) Signup and view all the answers

In Caesar Cipher, what happens to each letter or character in the plaintext?

It gets shifted by a fixed number of positions (C) Signup and view all the answers

When using asymmetric key encryption, who uses their private key to decrypt the message?

Alice (A) Signup and view all the answers

In asymmetric key encryption, what is the purpose of using the public key?

To encrypt the message (A) Signup and view all the answers

What is the main concern of data security in computer studies?

Protecting software and data from unauthorized tampering (B) Signup and view all the answers

In the context of privacy in computer studies, what is a common measure used by companies to prevent data tampering?

Careful screening of job applicants (D) Signup and view all the answers

What is the purpose of visual cryptography in computer studies?

Enhancing data security through image encryption techniques (C) Signup and view all the answers

How do large organizations ensure continuity in computer operations during disasters according to the text?

Having disaster recovery plans (D) Signup and view all the answers