Page 255 - CISSO_Prep_ Guide

• Susceptible to plaintext
attack.
• Uses the same key for
each 64-bit block.

• Block mode: Cipher Block
Chaining (CBC)
• Used for encrypting
documents, files, and
storage media.

• Stream Mode (block ciphers can
have stream characteristics):
Cipher Feedback (CFB)
• Used for encrypting
streaming
communication (VPN,
phone, vide).
• Faster than CBC.

• Stream mode: Output feedback (OFB)
• Used for encrypting
streaming
communications
• Faster than CFB.

• Stream mode: Counter (CTR)
• Used for streaming
communication.