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Encryption Modes with Almost Free Message Integrity
Block Cipher (e.g. AES)
Cipher Block Chaining Mode (CBC)
Authentication Codes using Block Ciphers (CBC MAC)
CBC Encryption & CBC-MAC together ??
CBC Encryption & CBCMAC together ??
New Scheme
Generating the Random Sequence
Pairwise Independent Random Sequence
Pairwise Independence
Pairwise Independence
Pairwise Independence (cont.)
Generating the Pairwise Independent Random Sequence
Subset Construction
Gray Code
Gray Code Construction
IACBC Mode of Operation
IAPM (Parallelizable Mode)
IAPM (Parallelizable Mode)
Provable Security
Impossibility Results
Alternate:: Pairwise Independence
Alternate Pairwise Ind (cont.)
IAPM (Parallelizable Mode)
IAPM (Parallelizable Mode)
Performance
Applications
IAPM: secure and efficient
Patents
Proof of Security (Message Integrity)
Proof of Security (Message Integrity)
Proof of Security (Message Integrity)
Proof of Security (Message Integrity)
Summary