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Questions tagged [ocb]

The Offset CodeBook Mode, an authenticated encryption mode of operation for a block cipher.

16
votes
4answers
6k views

Why is OCB-AES mode not becoming a standard for authenticated encryption?

The OCB mode of authenticated encryption (used for example with AES) is the fastest way to provide authenticity and confidentiality without having to strive into questions like: Encrypt then MAC, MAC ...
1
vote
1answer
219 views

Forgery attack on OCB

When using same nonce in OCB mode of authenticated encryption, how forgery attack can be done?