منابع مشابه
Modes of Operation of a Block Cipher
A n-bit block cipher with a k-bit key is a set of 2k bijections on n-bit strings. A block cipher is a flexible building block; it can be used for encryption and authenticated encryption, to construct MAC algorithms and hash functions. When a block cipher is used for confidentiality protection, the security goal is to prevent a passive eavesdropper with limited computational power to learn any i...
متن کاملA Block-Cipher Mode of Operation for Parallelizable Message Authentication
We define and analyze a simple and fully parallelizable block-cipher mode of operation for message authentication. Parallelizability does not come at the expense of serial efficiency: in a conventional, serial environment, the algorithm’s speed is within a few percent of the (inherently sequential) CBC MAC. The new mode, PMAC, is deterministic, resembles a standard mode of operation (and not a ...
متن کاملCounter Chain: A New Block Cipher Mode of Operation
In this paper, we propose a novel block cipher mode of operation, which is known as the counter chain (CC) mode. The proposed CC mode integrates the cipher block chaining (CBC) block cipher mode of operation with the counter (CTR) mode in a consistent fashion. In the CC mode, the confidentiality and authenticity of data are assured by the CBC mode, while speed is achieved through the CTR mode. ...
متن کاملA Unified Indifferentiability Proof for Permutation- or Block Cipher-Based Hash Functions
In the recent years, several hash constructions have been introduced that aim at achieving enhanced security margins by strengthening the Merkle-Damgård mode. However, their security analysis have been conducted independently and using a variety of proof methodologies. This paper unifies these results by proposing a unique indifferentiability proof that considers a broadened form of the general...
متن کاملRecommendation for Block Cipher Modes of Operation: Methods for Format-Preserving Encryption
This Recommendation specifies three methods for format-preserving encryption, called FF1, FF2, and FF3. Each of these methods is a mode of operation of the AES algorithm, which is used to construct a round function within the Feistel structure for encryption.
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ژورنال
عنوان ژورنال: Energy Procedia
سال: 2011
ISSN: 1876-6102
DOI: 10.1016/j.egypro.2011.12.274