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COFFE: Ciphertext Output Feedback Faithful Encryption
authenticated encryption provable security side-channel
2016/1/5
In this paper we introduce the first authenticated encryption scheme based on a
hash function, called COFFE. This research has been motivated by the challenge to fit secure
cryptography into constra...
Cryptanalysis of the Authenticated Encryption Algorithm COFFE
COFFE Authenticated cipher Forgery Attack
2015/12/24
COFFE is a hash-based authenticated encryption scheme. In the original paper,
it was claimed to have IND-CPA security and also ciphertext integrity even in nonce-misuse
scenario. In this paper, we a...