Talk:Block cipher

message: The image for this article is screwed up, at least in Firefox. Anyone got a better one?  —Preceding unsigned comment added by Burningmace (talk • contribs) 20:13, 19 December 2008 (UTC)
thread_title:  Image 

message: <Quoting Nageh 13:12, 7 April 2012 (UTC)
replies: text: Have a look at my section. I don't think it is either too long or too short. Nageh (talk) 14:51, 7 April 2012 (UTC)
thread_title:  Modes of operation 

message: There are other families like ARX primitives. If you look at the structures used in SHA-3 candidates you see more examples:
* Under Feistel ciphers, unbalanced Feistel and other modifications could be notable. MD5 was roughly an unbalanced Feistel network, flipped sideways. Luby-Rackoff constructions are Feistel. 
* Under operations, "AES-like": more specific than an SPN, these share S-boxes and matrix operations. Besides AES it'd include Camellia and SHA-3 transforms exploiting AES-NI. 
* Under operations, bitsliced, often meaning applying S-boxes as logic operations on words: Serpent in the AES compo was one; JH in SHA-3.
There are some other potentially useful distinctions, like whether a design was mainly aimed at hardware, software, or both (e.g., Blowfish is software-oriented with the relatively big RAM requirements; DES was hardware-oriented and inconvenient for software; the AES contest explicitly targeted both), and worth noting that performance engineering is a big part of new-algorithm design (I recall a good quote from Schneier about this about molding the algorithm to the processor, but can't find it).  — Preceding unsigned comment added by 98.207.62.11 (talk) 06:07, 14 August 2015 (UTC)
thread_title:  Other recognizable 'families' 

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thread_title:  External links modified 

message: >>Many modern block ciphers and hashes are ARX algorithms—their round function involves only three operations: modular addition, rotation with fixed rotation amounts, and XOR (ARX). Examples include Salsa20, Speck, XXTEA, and BLAKE. 
Salsa20 is a stream cipher  — Preceding unsigned comment added by 79.27.113.183 (talk) 00:48, 22 May 2017 (UTC)
thread_title:  ARX Ciphers 

message: A "xor cipher" is just an ECB mode block cipher. Ethanpet113 (talk) 18:00, 5 July 2021 (UTC)
replies: text: I would argue against such a merger, due to the historical significance of the simple XOR cipher in the stream cipers used during WWII, e.g. The Lorenz cipher. --TedColes (talk) 21:55, 5 July 2021 (UTC)

text: Agreeing with the above argument against the merger. In addition to the XOR Cipher being historically significant as a stand-alone concept, the Block Cipher page is more dedicated to general block cipher concepts, whereas the XOR Cipher page details XOR specifically. Though XOR Ciphers are a type of block cipher, the XOR Cipher page explains specifics regarding usefulness of XOR in Cryptography, providing code examples and other information that would be too in-depth for XOR specifically to be appropriate for a generic Block Cipher page. I believe it is important to reference block ciphers on the XOR Cipher page, and vice versa, but a merge would overall diminish the information quality in both articles. Kaelin-L (talk) 16:45, 8 September 2021 (UTC)
replies: text: Closing, given the consensus not to merge. Klbrain (talk) 12:00, 12 December 2021 (UTC)
thread_title:  Proposed merge of [[XOR cipher]] into [[Block cipher]]