3.10.10 Check Your Understanding – Cryptography Answers

1. Which encryption method repeats an algorithm process three times and is considered very trustworthy when implemented using very short key lifetimes?

  • Rivest Cipher
  • Triple DES
  • Block Cipher
  • Data Encryption Standard
  • Stream Cipher

Explanation: Triple DES or 3DES repeats an algorithm process three times and is considered very trustworthy when implemented using very short key lifetimes.

2. Which encryption method encrypts plaintext one byte or one bit at a time?

  • Rivest Cipher
  • Block Cipher
  • Data Encryption Standard
  • Software Encryption algorithm
  • Stream Cipher

Explanation: A stream cipher encrypts one byte or one bit at time.

3. Which encryption method uses the same key to encrypt and decrypt data?

  • Triple DES
  • Symmetric
  • Block Cipher
  • Data Encryption Standard
  • Asymmetric

Explanation: Symmetric encryption methods use the same key to encrypt and decrypt data.

4. Which encryption method is a stream cipher and is used to secure web traffic in SSL and TLS?

  • Rivest Cipher
  • Triple DES
  • Symmetric
  • Block Cipher
  • Data Encryption Standard

Explanation: The Rivest cipher is a stream cipher that is used to secure web traffic in SSL and TLS.

 

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