Modes of Operation

• Modes of Operation
• 1. Electronic Code Book (ECB)
• 2. Cipher Block Chaining (CBC)
• 3. k-Bit Output Feedback Mode (OFB)
• 4. k-Bit Cipher Feedback Mode (CFB)
• 5. Counter Mode (CTR)
• Message Authentication Code (MAC)
• Weak and Semi-Weak Keys
• Privacy + Integrity
• MISTY1
• KASUMI
• GSM Encryption
• DES Attacks
• 3DES
• CBC: Outside
• CBC: Inside
• Key 3DES Design Decisions
• 1. Why not 2DES?
• 2. Why Only Two Keys?
• 3. Why E-D-E and not E-E-E?
• 4. Why CBC outside?
• Summary
• References

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