Talk:Twofish

This is the talk page for discussing improvements to the Twofish article.
This is not a forum for general discussion of the article's subject.

Put new text under old text. Click here to start a new topic.
New to Wikipedia? Welcome! Learn to edit; get help.

Article policies

Find sources: Google (books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL

Cryptography: Computer science High‑importance

	This article is within the scope of WikiProject Cryptography, a collaborative effort to improve the coverage of Cryptography on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.CryptographyWikipedia:WikiProject CryptographyTemplate:WikiProject CryptographyCryptography articles
High	This article has been rated as High-importance on the importance scale.
	This article is supported by WikiProject Computer science (assessed as High-importance).

Computing: Networking / Software / Security Mid‑importance

This article is within the scope of WikiProject Computing, a collaborative effort to improve the coverage of computers, computing, and information technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ComputingWikipedia:WikiProject ComputingTemplate:WikiProject ComputingComputing articles

Mid

This article has been rated as Mid-importance on the project's importance scale.

This article is supported by Networking task force.

This article is supported by WikiProject Software.

This article is supported by WikiProject Computer Security.

Things you can help WikiProject Computer Security with:

Article alerts will be generated shortly by AAlertBot. Please allow some days for processing. More information...

Review importance and quality of existing articles
Identify categories related to Computer Security
Tag related articles
Identify articles for creation (see also: Article requests)
Identify articles for improvement
Create the Project Navigation Box including lists of adopted articles, requested articles, reviewed articles, etc.
Find editors who have shown interest in this subject and ask them to take a look here.

Software: Computing Mid‑importance

	This article is within the scope of WikiProject Software, a collaborative effort to improve the coverage of software on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.SoftwareWikipedia:WikiProject SoftwareTemplate:WikiProject Softwaresoftware articles
Mid	This article has been rated as Mid-importance on the project's importance scale.
	This article is supported by WikiProject Computing.

Technology

This article is within the scope of WikiProject Technology, a collaborative effort to improve the coverage of technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.TechnologyWikipedia:WikiProject TechnologyTemplate:WikiProject TechnologyTechnology articles

Electronics

	Electronics portal This article is part of WikiProject Electronics, an attempt to provide a standard approach to writing articles about electronics on Wikipedia. If you would like to participate, you can choose to edit the article attached to this page, or visit the project page, where you can join the project and see a list of open tasks. Leave messages at the project talk pageElectronicsWikipedia:WikiProject ElectronicsTemplate:WikiProject Electronicselectronic articles
???	This article has not yet received a rating on the project's importance scale.

Business

	Business portal This article is within the scope of WikiProject Business, a collaborative effort to improve the coverage of business articles on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.BusinessWikipedia:WikiProject BusinessTemplate:WikiProject BusinessWikiProject Business articles
???	This article has not yet received a rating on the project's importance scale.

Information

There appears to be a great deal of information regarding the AES selection and Twofish (and all the other nominees) here at [1]. I'm going to incorporate parts of this into the article, including the info about supposed breaks, but be forewarned, I'm not a crypto geek. Sword 17:45, 4 Nov 2004 (UTC)

Murphy & Robshaw attack

Twofish's S-boxes are key dependent but do not change with each encryption. The attack referred to is [2] (ps) but it's not very relevant (it only breaks five of Twofish's 16 rounds) and should either form part of a longer section on cryptanalysis of Twofish or be dropped. I've removed it for now. ciphergoth 13:01, 2004 Nov 16 (UTC)

For reference, S. Murphy and M. Robshaw report that knowing that the S-boxes change with each encryption, that one can craft a differential attack by choosing a plaintext and seeing what the output is. This has only been suggested against a reduced-round (near 5) Twofish. is the removed text. — Matt 13:16, 16 Nov 2004 (UTC)

Diagram ERROR: The one-bit left rotate in the column containing K2 and K6 should be a one-bit RIGHT rotate

The one-bit left rotate in the column containing K₂ and K₆ should be a one-bit RIGHT rotate. The other rotate (in the rightmost column) should indeed be a left rotate. Compare with figure 1 on page 6 of the twofish paper.

It also might be worth describing the symbols for addition modulo 2³² and XOR. —The preceding unsigned comment was added by 192.35.100.1 (talk • contribs) 07:27, 8 June 2006 (UTC)

Indeed, I fixed it. Dchestnykh (talk)

The legend in the picture says addition modulo 32 and maybe 33, when it should be addition modulo 2³². Unfortunately, I don't have the tools to correct it. Doctorhook (talk) 01:47, 2 August 2011 (UTC)[reply]

Resolved

Fixed. Dchestnykh (talk)

Attacks on Twofish with reduced number of rounds

It might be worth mentioning how many rounds can currently be broken. This is mentioned in "A Performance Comparison of the Five AES Finalists", but I don't know if that is still sufficiently up-to-date. —Preceding unsigned comment added by 81.102.136.40 (talk) 12:41, 23 August 2008 (UTC)[reply]

Outdated??

The dramatic 'outdated' notice at the top of the page totally puzzles me. Whoever put it there could have written two words to at least hint at what he had in mind. Currently, it leaves the impression that Twofish was totally broken by some recent ingenious attack but I fail to find anything about it, quite the contrary. 84.50.19.83 (talk) 06:35, 9 October 2013 (UTC)[reply]

I've removed it. If anyone wishes to put it back up, do include a reason.77.68.144.35 (talk) 08:13, 5 November 2013 (UTC)[reply]