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COFFE: Ciphertext Output Feedback Faithful Encryption
authenticated encryption provable security side-channel
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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
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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...