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Introduction to Cryptography

Information Technology

Foundational concepts of encoding and securing digital information.

cybersecurity encryption history

8 Questions Easy Ages 14+ Jul 19, 2026

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About this Study Set

This study set covers Information Technology through 8 practice questions. Foundational concepts of encoding and securing digital information. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 8 questions from the Introduction to Cryptography study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the primary purpose of cryptography?

A To increase internet speed
B To secure communication and data
C To compress large files
D To design user interfaces

2 Which term describes the process of converting readable information into an unreadable format?

A Decoding
B Transmission
C Encryption
D Hashing

3 What is the name for the scrambled, unreadable version of a message?

A Ciphertext
B Plaintext
C Metadata
D Algorithm

4 What is the name for the original, readable message before it is encrypted?

A Secret text
B Plaintext
C Bytecode
D Binary

5 In a simple Caesar cipher, how is the data transformed?

A By swapping binary bits
B By shifting letters in the alphabet
C By deleting every second word
D By changing the font style

6 What is a 'key' used for in the context of encryption?

A To physically lock a computer
B To reset a forgotten password
C To encrypt or decrypt data
D To speed up a network connection

7 Which of the following is a symmetric encryption method where the same key is used for both locking and unlocking?

A Caesar cipher
B Public-key infrastructure
C Multi-factor authentication
D Network firewall

8 What is the process of converting ciphertext back into its original readable form?

A Encoding
B Decryption
C Hacking
D Compressing

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