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Topic: Twofish

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Advanced Encryption Standard

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Advanced Encryption Standard process

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Block cipher modes of operation

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	Twofish - Wikipedia, the free encyclopedia
		Twofish is related to the earlier block cipher Blowfish.
		Twofish's distinctive features are the use of pre-computed key-dependent S-boxes, and a relatively complex key schedule.
		Twofish was designed by Bruce Schneier, John Kelsey, Doug Whiting, David Wagner, Chris Hall, and Niels Ferguson; the "extended Twofish team" who met to perform further cryptanalysis of Twofish and other AES contest entrants included Stefan Lucks, Tadayoshi Kohno, and Mike Stay.
	en.wikipedia.org /wiki/Twofish (259 words)

	Links - CAESAR - Twofish (Site not responding. Last check: 2007-11-07)
		Twofish is a 128-bit block cipher that accepts a variable-length key up to 256 bits.
		The cipher is a 16-round Feistel network with a bijective F function mate up of four key-dependent 8-by-8-bit S-boxes, a fixed 4-by-4 maximum distance separable matrix over GF(2^8), a pseudo-Hadamard transform, bitwise rotations, and a carefully designed key schedule.
		A fully optimized implementation of Twofish encrypts on a Pentium Pro at 17.8 clock cycles per byte, and an 8-bit smart card implementation encrypts at 1820 clock cycles per byte.
	www.dice.ucl.ac.be /DICE/crypto/CAESAR/twofish_cardis.html (139 words)

	Strong Encryption Package, Twofish
		The Twofish block cipher is Counterpane Labs' candidate for the new Advanced Encryption Standard.
		Twofish is a 128-bit block cipher, meaning that data is encrypted and decrypted in 128-bit chunks.
		Twofish can be implemented with fewer rounds but there is no compelling reason to do this, as Twofish is a very fast algorithm already and attacks have been discovered against the 5 round version.
	www.tropsoft.com /strongenc/twofish.htm (1159 words)

	Twofish - Pictures (Site not responding. Last check: 2007-11-07)
		As of 2004, there is no known attack on Twofish more efficient than brute force key search.
		Twofish web page (http://www.schneier.com/twofish.html) with full specifications, free source code, and other Twofish resources.
		David Wagner's sci.crypt post recommending AES over Twofish (http://groups.google.com/groups?selm=bug3qh%24281q%241%40agate.berkeley.edu) — Wagner was one of the designers of Twofish.
	greatestinfo.org /Twofish (205 words)

	Wired News: Twofish Heads to Washington (Site not responding. Last check: 2007-11-07)
		Twofish, the sequel to Schneier's 5-year-old Blowfish block cypher, was submitted last week to the National Institute of Standards and Technology (NIST) for consideration as the Advanced Encryption Standard.
		Twofish is designed to be flexible with respect to the necessary performance tradeoffs between the creation of a "secret key" and execution of the actual encryption.
		In submitting Twofish, Schneier's group joins about a dozen others aiming for the NIST standard, including IBM, RSA Data Security and Cylink.
	www.wired.com /news/print/0,1294,12984,00.html (284 words)

	Twofish
		Twofish is a block cipher by Counterpane Labs.
		Twofish is unpatented, and the source code is uncopyrighted and license-free; it is free for all uses.
		The designers of Twofish offered $10,000 in prize money for the best attack on Twofish during the first round of the AES evaluation.
	www.schneier.com /twofish.html (208 words)

	Trawling Twofish (revisited) - Knudsen (ResearchIndex) (Site not responding. Last check: 2007-11-07)
		Abstract: Twofish is a 128-bit block cipher submitted as a candidate for the Advanced Encryption Standard (AES).
		In this paper we consider mainly differentials of Twofish and show that there are differentials for Twofish for up to 16 rounds, predicting at least 32 bits of nontrivial information in every round.
		As it turned out, the very same structure of Twofish that he was using prevented the attack he presented.
	citeseer.ist.psu.edu /549014.html (539 words)

	Re: Twofish in OpenSSH (Site not responding. Last check: 2007-11-07)
		> >no, i say that twofish needs 32 bytes for keys but the >algorithm used for generating the session keys uses >SHA1 internally, so the entropy of the session key >is not more than 20 bytes.
		But Twofish accepts several key sizes, including 16 bytes, so there's likely no serious loss.
		Why?) The real weakness is in the pass phrase, which certainly doesn't have that much entropy, and maybe in the random number generator that's producing the actual keys...
	www.mail-archive.com /ssh@clinet.fi/msg04503.html (134 words)

	Products That Use Twofish (Site not responding. Last check: 2007-11-07)
		Counterpane has not verified that Twofish has been implemented properly, nor have we evaluated the security of these products.
		The Gnu Privacy Guard is a full replacement for PGP that supports Blowfish and Twofish as well as many other algorithms.
		Twofish is used for the optional content encryption modes.
	www.counterpane.com /twofish-products.html (691 words)

	Twofish Unlimited - Bicycle Accessory Fasteners
		The most convenient and cost-effective way to put a water bottle cage on a bike without braze-on lugs.
		Includes a 23 ounce water bottle with the Twofish insignia.
		A larger version of the Bikeblock with an extended strap, the Mega Block is the best holder for large U-locks, the pump bracket of choice for fat tube bikes, and the ideal fastener for large accessories.
	www.twofishunlimited.com /bike.html (257 words)

	Twofish - a Whatis.com definition (Site not responding. Last check: 2007-11-07)
		Twofish is an encryption algorithm based on an earlier algorithm, Blowfish, and was a finalist for a NIST Advanced Encryption Standard (AES) algorithm to replace the DES algorithm.
		Twofish uses a single key of any length up to 256 bits and is said to be efficient both for software that runs in smaller processors such as those in smart cards and for embedding in hardware.
		Designed by Bruce Schneier's Counterpane Systems, Twofish is unpatented, license-free, and freely available for use.
	searchsecurity.techtarget.com /sDefinition/0,,sid14_gci763124,00.html (157 words)

	The Twofish Encryption Algorithm: A 128-Bit Block Cipher by Bruce Schneier [ISBN: 0471353817] - Find Cheap Textbook ...
		Highly secure and flexible, Twofish works extremely well with large microprocessors, 8-bit smart card microprocessors, and dedicated hardware.
		It is a thorough exposition of the making of the Twofish cypher, the latest attempt to secure information as absolutely as possible.
		However, there are only a handful of pages on "Using Twofish", and none of them have anything like a step-by-step howto.
	www.gettextbooks.com /isbn_0471353817.html (567 words)

	[TWOFISH MEDIA] (860) 429-3786 CD Duplication Wedding CD's Personalized Recordable CD's (Site not responding. Last check: 2007-11-07)
		TwoFish Media was one of the best wedding choices I made while planning the big day.
		Not only did a get a high quality product that came in under my budget for party favors, they were polite, efficient, offered amazing customer support and helped me impress all the guests at my wedding.
		Twofish Media was one of the best choices I made during my wedding.
	www.twofishmedia.com /wedding.html (991 words)

	Eggdev: eggdrop1.5.twofish.mod.tar.gz (Site not responding. Last check: 2007-11-07)
		This is a module i have created for furture implementations of the twofish encryption.
		Usage documentation is included in twofish.mod/proc.c I have on hand code that can also make the best use out of reading/encrypting and writing/decrypting files with twofish.
		This encryption is intended for FUTURE FILE/BOTLINK enciphering, and NOT for password use; because it could currupt the userfile.
	www.eggheads.org /pipermail/eggdev/2000-September/017292.html (160 words)

	Twofish for Python (Site not responding. Last check: 2007-11-07)
		Brian Gladman's "C" implementation of Counterpane's TwoFish encryption algorithm, a candidate for the Advanced Encryption Standard competition.
		The twofish module source code is released as Open Source software under a BSD-style license courtesy of Enhanced Software Technologies Inc., the makers of BRU, the #1 commercial tape backup utility for Linux/Unix.
		The actual low-level TwoFish encryption code is released as Open Source software under a BSD-like license by Dr.
	twofish-py.sourceforge.net /twofish-py.html (362 words)

	Twofish: A 128-Bit Block Cipher (Site not responding. Last check: 2007-11-07)
		ABSTRACT: Twofish is a 128-bit block cipher that accepts a variable-length key up to 256 bits.
		The cipher is a 16-round Feistel network with a bijective F function made up of four key-dependent 8-by-8-bit S-boxes, a fixed 4-by-4 maximum distance separable matrix over GF(2
		We have extensively cryptanalyzed Twofish; our best attack breaks 5 rounds with 2
	www.schneier.com /paper-twofish-paper.html (184 words)

	farm9.com, Inc. Open Source Projects (Site not responding. Last check: 2007-11-07)
		Cryptcat is the standard netcat enhanced with twofish encryption with ports for WIndows NT, BSD and Linux.
		TCP/IP swiss army knife extended with twofish encryption - Cryptcat is a simple Unix utility which reads and writes data across network connections, using TCP or UDP protocol while encrypting the data being transmitted.
		It is designed to be a reliable "back-end" tool that can be used directly or easily driven by other programs and scripts.
	farm9.com /content/Free_Tools/Cryptcat (121 words)

	Further Observations on the Key Schedule of Twofish - Whiting, Kelsey, Schneier, Wagner, Ferguson, Hall (ResearchIndex) (Site not responding. Last check: 2007-11-07)
		Abstract: Twofish is a 128-bit block cipher submitted as an AES candidate [SKW+98].
		Mirza and Murphy [MM99] recently noted two interesting properties in the Twofish key schedule for 128-bit keys: there is a non-uniform distribution of 128-bit whitening keys, and the 64-bit round subkeys are non-uniformly distributed over each subset of keys that fixes the S-boxes.
		Whiting, J. Kelsey, B. Schneier, D. Wagner, N. Ferguson, and C. Hall, "Further Observations on the Key Schedule of Twofish," Twofish Technical Report #4, 16 Mar 1999.
	citeseer.ist.psu.edu /whiting99further.html (296 words)

	Twofish - netlexikon
		Twofish ist ein symmetrischer Verschlüsselungsalgorithmus, der von Bruce Schneier mitentwickelt wurde.
		Twofish ist eine Blockchiffre mit einer Blockgröße von 128 Bit.
		Anleitung zur Verwendung von Twofish (von SuSE, alt aber gut) (http://www.suse.de/de/private/support/online_help/howto/crypto/#2)
	www.lexikon-definition.de /Twofish.html (95 words)

	Amazon.com: Books: The Twofish Encryption Algorithm: A 128-Bit Block Cipher (Site not responding. Last check: 2007-11-07)
		This item is not eligible for Amazon Prime, but over a million other items are.
		This is the official discription of the Twofish encryption algorithm by the people that developed it.
		The book gives the direct discription of what they have done, PLUS the reasons behind the choices that they made, and the considerations that were involved.
	www.amazon.com /exec/obidos/tg/detail/-/0471353817?v=glance (1315 words)

	ACCU Reviews: The Twofish Encryption Algorithm
		The process instigated by NIST to find AES (Advanced Encryption Standard) is a multi-round one in which candidates are eliminated and the remainder have time to refine their work.
		The Twofish Encryption Algorithm is one of the contenders.
		Ultimately other criteria will also be taken into account including the ready availability of software and experience in using the algorithm.
	www.accu.org /bookreviews/public/reviews/t/t001920.htm (293 words)

	NetAction's Guide to Encryption: Appendices A and B
		Twofish is unpatented, and the source code is uncopyrighted and license-free; it is free for all uses." (Counterpane Internet Security: Twofish: A New Block Cipher) It operates under the symmetric key model.
		The Twofish Encryption Algorithm: Block Encryption for the 21st Century
		RSA is a family of algorithms that employ the asymmetric key model.
	www.netaction.org /encrypt/appendix.html (1618 words)

	Twofish (JQuickBase 0-0-4 API Documentation, ) (Site not responding. Last check: 2007-11-07)
		Twofish was submitted by Bruce Schneier, Doug Whiting, John Kelsey, Chris Hall and David Wagner.
		TWOFISH2.C -- Optimized C API calls for TWOFISH AES submission, Version 1.00, April 1998, by Doug Whiting.
		Copyright © 1998 Systemics Ltd on behalf of the Cryptix Development Team.
	jquickbase.sourceforge.net /api/kse/com/jqb/util/Twofish.html (462 words)

	NetMangler :: Encrypt your emails and protect yourself with NetMangler. NetMangler can be used with Outlook, Eudora, ...
		Download NetMangler and use all the features including the Print and Address Book facility with Blowfish encryption, with no time limit or expiry.
		Register the product and unlock Twofish, Rijndael and our 'patent pending' unbreakable PAD technology NPT (based on One Time Pads).
		The registered version adds Twofish, Rijndael and NetMangler Pad Technology (Patent Pending).
	www.ultimaterepository.com /Utilities/Presentation%20Tools/10876.aspx (290 words)

	Twofish Software
		Keywords: encryption software encryption decryption security file folder strong encryption aes rijndael twofish rsa strong file folder encryption decryption windows utility
		Keywords: encryption software encryption service security scheduler automate strong encryption aes rijndael twofish rsa encryption software run scheduled encryption decryption sessions service
		Keywords: file encryption encryption crypto cryptography data encryption blowfish twofish email encryption shredder shredding file deletion file shredder password protect password protect files security des tripledes
	www.systemfilesland.com /software/twofish.html (88 words)

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