Symmetric encryption (AES, DES) in Cybersecurity - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the type of encryption used.

Cybersecurity

encryption_type = "[1]"  # Common symmetric encryption algorithm

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AMD5

BAES

CSHA256

DRSA

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing symmetric encryption with asymmetric encryption.

Mixing up encryption algorithms with hashing functions.

AES is a widely used symmetric encryption algorithm. RSA is asymmetric, and SHA256 and MD5 are hashing algorithms.

2fill in blank

medium

Complete the sentence to describe the key usage in symmetric encryption.

Cybersecurity

In symmetric encryption, the same [1] is used for both encryption and decryption.

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Aalgorithm

Bsignature

Chash

Dkey

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing algorithm instead of key.

Confusing key with hash or signature.

Symmetric encryption uses the same key for both encrypting and decrypting data, unlike asymmetric encryption which uses a key pair.

3fill in blank

hard

Fix the error in the statement about DES encryption key size.

Cybersecurity

DES uses a [1]-bit key for encryption.

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A56

B256

C128

D64

Attempts:

3 left

💡 Hint

Common Mistakes

Assuming DES uses 64 bits as the effective key size.

Confusing DES key size with AES key sizes.

DES uses a 56-bit key for encryption, although the key is often represented as 64 bits including parity bits.

4fill in blank

hard

Fill both blanks to complete the description of symmetric encryption modes.

Cybersecurity

AES can operate in different modes like [1] and [2], which affect how data blocks are encrypted.

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ACBC

BRSA

CECB

DSHA

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing RSA or SHA as modes of AES.

Confusing encryption algorithms with modes.

CBC (Cipher Block Chaining) and ECB (Electronic Codebook) are common modes of operation for AES symmetric encryption.

5fill in blank

hard

Fill all three blanks to complete the dictionary comprehension describing key lengths.

Cybersecurity

key_lengths = {"AES-128": [1], "AES-192": [2], "AES-256": [3]

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A128

B192

C256

D64

Attempts:

3 left

💡 Hint

Common Mistakes

Using 64 bits as an AES key length.

Mixing up the order of key lengths.

AES supports key lengths of 128, 192, and 256 bits for different security levels.