cipher feedback

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cipher feedback

[¦sī·fər ¦fēd‚bak]
(communications)
An implementation of ciphertext autokey cipher in which the leftmost n bits of the data encryption standard (DES) output are added by the EXCLUSIVE OR operation to N bits of plaintext to produce N bits of ciphertext (where N is the number of bits enciphered at one time), and these N bits of ciphertext are fed back into the algorithm by first shifting the current DES input N bits to the left, and then appending the N bits of ciphertext to the right-hand side of the shifted input to produce a new DES input used for the next iteration of the algorithm.
References in periodicals archive ?
Several block cipher modes of operation have been proposed in the literature to protect sensitive information.
Keywords: Block cipher modes of operation, cryptography, computer security, network security, one-time key
Then, one of the block cipher modes of operation is used to provide the required confidentiality and/or authenticity.
Several standard block cipher modes of operation have been introduced.
The aforementioned block cipher modes of operation provided confidentiality and/or authenticity.
1 is used to generate a chaotic sequence while the merits and demerits of related block cipher modes of operation are introduced in Section 2.
This section discusses briefly the advantages and disadvantages of the current block cipher modes of operation related to the proposed SPCBC mode.
Thus, the SPCBC mode significantly enhances the security over the current block cipher modes of operation as discussed in Section 4.
Unfortunately, the current standard block cipher modes of operation such as ECB, CBC, and CTR are vulnerable to these types of attacks.
The related attack model illustrated that any of the current standard block cipher modes of operation can be exploited to attack other block cipher modes.
In addition, it has a superior security over the current block cipher modes of operation.
Recommendation for block cipher modes of operation.