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Topic: Twofish encryption algorithm

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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_encryption_algorithm (259 words)

	Twofish encryption algorithm
		Twofish is a symmetric key[?] block cipher with a block size[?] of 128 bits and key sizes up to 256 bits.
		On most software platforms Twofish is slightly slower than AES for 128-bit keys, but somewhat faster for 256-bit keys.
		Twofish web page (http://www.counterpane.com/twofish.html) with full specifications, free source code, and other Twofish resources.
	www.ebroadcast.com.au /lookup/encyclopedia/tw/Twofish_encryption_algorithm.html (142 words)

	The IDEA Encryption Algorithm
		The procedure is quite complicated using subkeys generated from the key to carry out a series of modular arithmetic and XOR operations on segments of the 64-bit plaintext block.
		The encryption involves modular multiplication with a modulus of ((2^16)+1) and addition with a modulus of (2^16).
		Note: for the purposes of the algorithm, a key of all zeros is defined as being equal to 2^16 for modular multiplication steps.
	www.finecrypt.net /idea.html (389 words)

	Encryption
		By selecting "TwoFish" from the drop-down box and choosing OK encryption will be enabled establishing a secure channel for communications between the client and server.
		Even if encryption mode is not set TwoFish encryption is used to create a secure channel for all communications setup to prevent password sniffing and man-in-the middle attacks.
		The TwoFish encryption algorithm was one of the selection finalist for the U.S. AES (Advanced Encryption Algorithm) by NIST.
	www.techpathways.com /webhelp/Getting_Started/Encryption.htm (219 words)

	International Data Encryption Algorithm - Wikipedia, the free encyclopedia
		In cryptography, the International Data Encryption Algorithm (IDEA) is a block cipher designed by Xuejia Lai and James L. Massey of ETH-Zürich and was first described in 1991.
		The algorithm was intended as a replacement for the Data Encryption Standard.
		IDEA operates on 64-bit blocks using a 128-bit key, and consists of a series of eight identical transformations (a round, see the illustration) and an output transformation (the half-round).
	en.wikipedia.org /wiki/International_Data_Encryption_Algorithm (486 words)

	Choosing encryption algorithm (Site not responding. Last check: 2007-10-08)
		Any 128-bit or 256-bit encryption algorithm used by Sentry is considered unbreakable.
		In case you are wondering why some encryption applications use 2048-bit or even larger keys, those applications use asymmetric (also called public key) encryption algorithms while Sentry is using symmetric encryption algorithms.
		Due to the difference in mathematics, for a symmetric algorithm size of the key considered unbreakable is 128-bit, while for an asymmetric algorithm it is usually much higher.
	www.softwinter.com /documentation/nt/Choosing_encryption_algorithm.htm (98 words)

	A Current Perspective on Encryption Algorithms
		This talk will present a perspective on the current state of play in the field of encryption algorithms, in particular on private key block ciphers which are widely used for bulk data and link encryption.
		It is optomised for bulk data encryption (since key changes are slow), and uses four large 8*32 bit random substitution boxes generated from the supplied key, whose outputs are combined using addition and xor.
		With the development of new algorithms, and their public evaluation, this should be easier than ever before, if only governments will address the political issues and accept its necessity and need for unrestricted use.
	www.adfa.edu.au /~lpb/papers/unz99.html (3752 words)

	Advanced Encryption Standard (AES) Development Effort (Site not responding. Last check: 2007-10-08)
		The algorithm(s) is expected to be used by the U.S. Government and, on a voluntary basis, by the private sector.
		In addition, the algorithm(s) must implement symmetric key cryptography as a block cipher and (at a minimum) support block sizes of 128-bits and key sizes of 128-, 192-, and 256-bits.
		The AES finalist candidate algorithms were MARS, RC6, Rijndael, Serpent, and Twofish, and NIST developed a Round 1 Report describing the selection of the finalists.
	csrc.nist.gov /encryption/aes/index2.html (852 words)

	Directory - Computers: Software: Shareware: Windows: Security: Encryption
		Crypto 2000 · cached · Simply drag-and-drop files and folders to protect sensitive documents, and then enter an encryption key to encode, and decode the files.
		Ashampoo Power Encrypt Deluxe · cached · One-click encryption and decryption plus self-decrypting archives for secure data transport to recipients who don't have the program.
		FileGuardian · cached · Software that uses a 128 bit key for the Advanced Encryption Standard (Rijndael encryption algorithm) to protect sensitive files from unwanted viewing.
	www.incywincy.com /default?p=231729 (734 words)

	PGP DH vs. RSA FAQ
		A conventional encryption algorithm is a function that maps an n-bit plaintext block to an n-bit ciphertext block where n is the blocksize.
		Twofish is an evolution of the cipher Blowfish.
		It is important in multiple encryption schemes that the underlying cipher is not a group; fortunately Campbell & Wiener have shown that DES is not a group [CW93].
	www.scramdisk.clara.net /pgpfaq.html (15220 words)

	Twofish
		Twofish is a block cipher by Counterpane Labs.
		It was one of the five Advanced Encryption Standard (AES) finalists.
		Twofish is unpatented, and the source code is uncopyrighted and license-free; it is free for all uses.
	www.schneier.com /twofish.html (208 words)

	Encryption algorithm books
		To quote one reviewer "if every one of your communication partners were using a secure system based on encryption, viruses, worms and hackers would have a very hard time".
		Cracking DES: Secrets of Encryption Research, Wiretap Politics and Chip Design is a book that, for the first time, reveals full technical details on how researchers and data-recovery engineers can build a working DES Cracker.
		The volume is divided in topical sections on cryptanalysis, new stream ciphers, design construction analysis, hash functions, pseudo-random generators, new block ciphers, and modes of operation.
	www.algorithm-books.com /encryption-algorithm-books-1.html (1065 words)

	Book encryption algorithm - GOST encryption algorithm: Russian analogue to US Standard? (Site not responding. Last check: 2007-10-08)
		This is the official discription of the Twofish encryption algorithm by the people The book has a readable style, and covers this algorithm in greater
		Encryption Software and books: The Twofish Encryption Algorithm: A 128-Bit Block Cipher, Cryptography.
		The use of encryption algorithms stronger than DES is also restricted.
	infoant.com /?q=book-encryption-algorithm (256 words)

	NetAction's Guide to Encryption: Appendices A and B
		The complexity of these algorithms prevents us from describing their workings in-depth in a guide intended for readers with limited technical knowledge of encryption, but here are some links and names that may be useful if you want to know more about the technical aspects of encryption software.
		Diffie-Hellman is an encryption algorithm that employs the asymmetric key model.
		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.
	www.netaction.org /encrypt/appendixb.html (1070 words)

	Download5000.com - PrimaSoft Encryption - Service Edition - encryption ... (Site not responding. Last check: 2007-10-08)
		Encryption algorithms: AES (US Advanced Encryption Standard) secret-key encryption algorithm known as Rijndael.
		Twofish encryption algorithm, a runner-up candidate for AES.
		Encryption compression and decompression: You can use the most popular ZIP archive file format within the Strong File Encryption / Decryption utility.
	www.download5000.com /page8809.aspx (276 words)

	Software (Site not responding. Last check: 2007-10-08)
		Twofish for Python: This is a module for Python which wraps Dr.
		Brian Gladman's "C" implementation of Counterpane's TwoFish encryption algorithm, a candidate for the Advanced Encryption Standard competition.
		Ocotillo: This is an attempt to create a cryptographically strong pseudo-random number generator for Unix implementations that do not have one.
	twofish-py.sourceforge.net /software.html (137 words)

	Trawling Twofish (revisited) - Knudsen (ResearchIndex) (Site not responding. Last check: 2007-10-08)
		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)

	The Twofish Encryption Algorithm: A 128-Bit Block Cipher, by B. Schneier; J. Kelsey; D. Whiting; D. Wagner; C. Hall; N. ... (Site not responding. Last check: 2007-10-08)
		Twofish is among the top 5 of 15 sophisticated encoding formulas being considered by the U.S. Department of Commerce National Institute of Standards and Technology (NIST) to replace the current standard DES (Data Encryption Standard), which is too weak and slow for today's computing power.
		Mathematical formulas, called algorithms, are at the heart of computerized encryption systems.
		Twofish is a product extension to Applied Cryptography, is among the leading contenders for U.S. government new millennium security standard, and both computer security developers and practitioners alike eagerly anticipate seeing its inner workings.
	www.webbooks.net /books/_Wiley2/Schneier2.html (229 words)

	The Twofish Encryption Algorithm: A 128-Bit Block Cipher
		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.
		This is the official discription of the Twofish encryption algorithm by the people that developed it.
	www.literacyconnections.com /0_0471353817.html (559 words)

	Xceed Encryption Library (Site not responding. Last check: 2007-10-08)
		It supports traditional secret-key encryption as well as public-key encryption, and can encrypt/decrypt memory buffers, strings, blobs, streaming data or files.
		For traditional strong encryption, the library supports the newly adopted AES (US Advanced Encryption Standard) secret-key encryption algorithm (Rijndael), which uses 128, 192 or 256-bit keys.
		The library uses the modern SHA-2 and HAVAL hashing algorithms so that passphrases can be converted to exactly the amount of bits required for an encryption key and with better mathematical properties than older hashing algorithms such as MD5.
	www.gwhz.com /m3401.html (320 words)

	AES Finalist Information
		Information on the AES finalist algorithms is available, including documentation, intellectual property (IP) statements, and test values.
		Additionally, source code for the AES finalists that has been provided by the algorithm submitters is now available on-line.
		Algorithm Specification - updated for Round 2 [1020KB]
	csrc.nist.gov /encryption/aes/round2/r2algs.htm (84 words)

	Public Relations - Press Releases (Site not responding. Last check: 2007-10-08)
		We have already implemented the Rijndael algorithm in hardware, and are adding software support in our security platform software." Doug Whiting is a co-author of the Twofish encryption algorithm, one of five finalists in the worldwide competition to develop a new encryption technique that can be used to protect computerized information.
		Hi/fn security processors are designed to accelerate the compression, encryption and authentication of data in virtual private networks (VPNs) or electronic commerce.
		Part of the security function is to perform strong encryption algorithms such as DES or 3-DES, and now AES.
	www.hifn.com /info/pr/pressreleases/pr_100400.html (462 words)

	EndCryptor: Backward secure public key email file encryption software, reveals identity theft.
		The evaluation period is 10 days after which no encryption or decryption is possible unless a license is obtained.
		The AES encryption keys are determined using elliptic curve public key technology.
		To see an attack designed against a specific encryption package, search the web for the caligula virus, this attack did not use a keylogger, but was a proof of concept attack.
	www.endcryptor.com (1868 words)

	Twofish for Python
		I hope to make this a source of general encryption information too, such as, for example, "what is CFB mode and when do I want to use it?".
		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)

	Octochat - octopod.org (Site not responding. Last check: 2007-10-08)
		Octopod Secure Chat (Octochat) is a chat program with file transfer abilities which used the TwoFish encryption algorithm (designed by Bruce Schnier) and runs on Windows XP.
		TwoFish is an encryption algorithm developed by the respected cryptographer Bruce Schnier.
		It is freely available, and used by Octochat to provide solid encryption for it's transmissions.
	www.octopod.org /mambo/index.php?option=com_content&task=blogcategory&id=69&Itemid=97 (175 words)

	CP-Lab.com - File Encryption XP - Best Encryption Software
		The reliable and ultra-secure Blowfish algorithm is used for data encryption and no encryption passwords are saved within the encrypted files.
		This is especially useful for deleting the source file after encryption so that the only remaining file is the encrypted version.
		Should you lose or forget your password, there is nothing we can do to help you gain access to your data, since the program employs strong encryption algorithm that make hacking or password picking impossible.
	www.cp-lab.com /filecrypt (691 words)

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