SYMMETRIC ENCRYPTION

QUESTION 1 OF 5

What are the components that make up a cryptosystem? Check all that apply. Great job! A cryptosystem is a collection of algorithms needed to operate an encryption service. This involves generating encryption keys, as well as encryption and decryption operations.

Transmission algorithms

Decryption algorithmsCorrect Answer

Encryption algorithmsCorrect Answer

Key generation algorithmsCorrect Answer

QUESTION 2 OF 5

What is steganography? Yep! Steganography involves hiding messages, but not encoding them.

The practice of hiding messagesCorrect Answer

The practice of encoding messages

The study of languages

The study of stegosauruses

QUESTION 3 OF 5

What makes an encryption algorithm symmetric? Awesome! The symmetry of a symmetric algorithm refers to one key being used for both encryption and decryption.

Different keys used for encryption and decryption

High speed

Very large key sizes

The same keys used for encryption and decryptionCorrect Answer

QUESTION 4 OF 5

What's the difference between a stream cipher and a block cipher? You got it! A stream cipher takes data in as a continuous stream, and outputs the ciphertext as a continuous stream, too. A block cipher encrypts the data in chunks, or blocks.

Block ciphers are only used for block device encryption.

Stream ciphers encrypt data as a continuous stream, while block ciphers operate on chunks of data.Correct Answer

Stream ciphers can't save encrypted data to disk.

There is no difference.

QUESTION 5 OF 5

True or false: The smaller the encryption key is, the more secure the encrypted data is. Nice work! The reverse is true. The larger the key, the more secure the encrypted data will be.

TRUE

FALSECorrect Answer

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What are the components that make up a cryptosystem? Check all that apply. Great job! A cryptosystem is a collection of algorithms needed to operate an encryption service. This involves generating encryption keys, as well as encryption and decryption operations.

💡Select all 3 correct answers before submitting (0 of 3 selected).

Transmission algorithms

Decryption algorithms

Encryption algorithms

Key generation algorithms

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