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Topic: Xor swap algorithm

	Exclusive disjunction - Open Encyclopedia (Site not responding. Last check: 2007-10-08)
		(A xor B) ⇔ (A and not B) or (not A and B) ⇔ (A or B) and (not A or not B) ⇔ (A or B) and not (A and B)
		The xor operation is sometimes used as a simple mixing function in cryptography, for example, with one-time pad or Feistel network systems.
		In digital logic design, a two-input xor logic gate is often thought of as a programmable inverter, in that if one input is held at a logic '1', the output will be the inverse of the other input.
	open-encyclopedia.com /Xor (576 words)

	Exclusive disjunction - the free encyclopedia (Site not responding. Last check: 2007-10-08)
		Exclusive disjunction (usual symbol xor) is a logical operator that results in true if one of the operands (not both) is true.
		The exclusive disjunction of propositions A and B is usually called A xor B, where "xor" stands for "exclusive or" and is pronounced "eks-or" or "zor".
		Because xor is associative, the order of the inputs does not matter: the same result will be obtained regardless of association.
	www.encyclopedia-of-knowledge.com /?t=Xor (597 words)

	Swap - Wikipedia, the free encyclopedia
		In finance a swap is an agreement to exchange one set of cash flows for another.
		Book swapping is the practice of swapping of books among people.
		Vote swapping is a tactical voting practice among voters.
	en.wikipedia.org /wiki/Swap (163 words)

	Xor swap algorithm -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-08)
		However, the XOR swap algorithm does not — this algorithm follows (where X and Y are the names of two variables, rather than two values):
		XOR AX, BX However, all x86 (Integrated circuit semiconductor chip that performs the bulk of the processing and controls the parts of a system) microprocessors have an XCHG instruction which does the same work on its operands more efficiently than the above sequence of XORs.
		If the language permits, the ugly details of swapping should be hidden inside a (A single computer instruction that results in a series of instructions in machine language) macro or an inlined function.
	www.absoluteastronomy.com /encyclopedia/x/xo/xor_swap_algorithm.htm (1026 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		The design philosophy behind the algorithm is one of "mixing operations from different algebraic groups." There are three algebraic groups whose operations are being mixed, all of which are easily implemented in both hardware and software: XOR.
		Swap the two inner blocks (except for the last round), and that's the input to the next round.
		The algorithm uses 52 of them (six for each of the eight rounds, and four more for the output transform.) First, the 128-bit key is divided into eight 16-bit subkeys.
	sigbus.nove.bg /pool/idea (1356 words)

	Xor swap algorithm
		In computer programming, the xor swap is an algorithm which uses the exclusive disjunction (XOR) operation to swap the values of two variables without a temporary variable.
		XOR R1, R2 where R1, and R2 are registers and the operation XOR leaves the result in the first argument.
		XOR AX, BX XOR BX, AX XOR AX, BX However, all x86 microprocessors have an XCHG instruction which does the same work on its operands more efficiently than the above sequence of XORs.
	www.brainyencyclopedia.com /encyclopedia/x/xo/xor_swap_algorithm.html (937 words)

	Blowfish encryption algorithm
		A standard encryption algorithm must be implementable on a variety of different platforms, each with their own requirements.
		The algorithm should have a flat keyspace, allowing any random bit string of the required length to be a possible key.
		The XOR can also be considered to be part of the non-reversible function, Ni, occurring at the end of the function.
	crypto-systems.com /blowfish.html (4045 words)

	Blowfish Paper
		DES [16], the workhorse encryption algorithm for the past fifteen years, is nearing the end of its useful life.
		While it may not be possible to satisfy all requirements with a single algorithm, it may be possible to satisfy them with a family of algorithms based on the same cryptographic principles.
		XOR P1 with the first 32 bits of the key, XOR P2 with the second 32-bits of the key, and so on for all bits of the key (possibly up to P14).
	www.schneier.com /paper-blowfish-fse.html (4087 words)

	Hot Swap Drive (Site not responding. Last check: 2007-10-08)
		Hot swapping is the ability to remove and replace components of a machine, usually a computer, while it is operating.
		These hot swap operations are generally used either to move a peripheral from one computer to another, or to allow a device to synchronize data with a computer.
		In these systems hot swap is normally used for regular maintenance to the computer, or to replace a broken part.
	www.blownspeakers.com /pages3/42/hot-swap-drive.html (839 words)

	Swap article - Swap computer science swap algorithm programming swap partition operating - What-Means.com (Site not responding. Last check: 2007-10-08)
		Swap can refer generically to the exchanging of two things.
		In finance a swap is an agreement to each one set of cash flows for another.
		For specific examples see interest rate swap and stock swap.
	www.what-means.com /encyclopedia/Swap (135 words)

	wikien.info: Main_Page (Site not responding. Last check: 2007-10-08)
		Standard swapping algorithms require the use of a temporary storage area - standard intuitive algorithms to swap x and y involve: copying y aside to a temporary storage areasetting y to be xcopying the temporary storage value back to x.
		Swap Magic is a disc (availible in CD and DVD formats) which allows users to play backed-up or pirated PlayStation 2 games on their PlayStation 2.
		Under a virtual memory system, it is the amount of swap space rather than the amount of physical memory which determines the maximum size of a single process and..
	www.hostingciamca.com /browse.php?title=S/SW/SWA (9655 words)

	Advanced Cryptographic Underground (Site not responding. Last check: 2007-10-08)
		By doing this, I morph the tables in the algorithm in a keyed non-linear fashion and both alterations to the tables become new potential possibilities to affect the next round of the algorithm.
		XOR is a mathmatical function that works at the binary level.
		Xor uses this Table: 0 XOR 0 = 0 0 XOR 1 = 1 1 XOR 0 = 1 1 XOR 1 = 0 This function is completely reversible.
	www.geocities.com /my_rotting_flesh (1021 words)

	ipedia.com: Exclusive disjunction Article (Site not responding. Last check: 2007-10-08)
		The exclusive disjunction of propositions A and B is usually called A xor B, where "xor" stands for " exclusive or " and is pronounced "eks-or".
		The exclusive disjunction of propositions A and B is usually called A xor B, where "xor" stands for "exclusive or" and is pronounced "eks-or".
		See also: symmetric difference, or, and, xor swap algorithm, xor linked list, parity, disjunctive syllogism, affirming a disjunct.
	www.ipedia.com /exclusive_disjunction.html (571 words)

	Xor - Cprogramming.com - Articles - XOR Encryption
		The XOR swap algorithm is a method of swapping two variables that does not //Move what's at pointer A to what's at pointer B, using an XOR swap to avoid
		The XOR gate differs from the OR gate in that the output will be true only when one of the inputs XOR gate symbol.
		The ëXORí in XOR encryption stands for the logical ëexclusive orí function, The point about the xor handler is that it works both as an encryption and
	hispider.com /?q=xor (691 words)

	Swap -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-08)
		(Click link for more info and facts about swap partition) swap partition used by ((computer science) software that controls the execution of computer programs and may provide various services) operating systems.
		In (The commercial activity of providing funds and capital) finance a swap is an agreement to exchange one set of cash flows for another.
		For example (Click link for more info and facts about interest rate swap) interest rate swap and (Click link for more info and facts about stock swap) stock swap.
	www.absoluteastronomy.com /encyclopedia/S/Sw/Swap.htm (214 words)

	BUGS DYNAMIC CRYPTOGRAPHY ALGORITHM
		This cryptography algorithm has been created with gradual goals, the first goal was to generate a key from a password, i.e., to crypt a small string length of text.
		The algorithm do this in a loop until all the bits have been used (in a swap or a logical operation), you can change the "round" of this loop with a parameter, it is the number of loop you want the algorithm to perform.
		This algorithm is nearly the same as the standard one, but this time ONE random number is generated and crypted using the same password used to crypt the clear text.
	www.encryptsolutions.com /english/info/doc/bugs_tech_main.html (10788 words)

	Performance Analysis of MD5
		Performance measurements for that algorithm were not available at the time of publication, but that estimate uses self-modifying code, which may affect its performance on processors with write-through instruction caches.
		As a result, this algorithm may not be competitive with MD5 in performance, although analysis was not possible prior to this publication.
		This algorithm was measured on a Sun SPARC 20/71, and uses 13 opcodes per 32-bit word of input on a SPARC, and 10 opcodes per 32-bit word of input on a 68040.
	www.isi.edu /touch/pubs/sigcomm95.html (6299 words)

	Dr. Dobb's, Blowfish--One Year Later
		DES is the workhorse of cryptography algorithms, and it's long past time to replace the 19-year-old standard.
		Cryptography is like that: confidence in an algorithm grows as group after group tries to break it and fails.
		The algorithm consists of two parts: a key-expansion part and a data-encryption part.
	www.schneier.com /paper-blowfish-oneyear.html (1122 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		The reason I am asking this is that I was given the task of taking your DES > algorithm and porting it to the Cray and modifying it to take advantage > of the vectorisation in an attempt to make the algorithm faster.
		The problem with the algorithm is that it is not vectorisable in this form.
		There may be other ways to implement the algorithm that will speed it up but the only obvious optimisation that springs to mind is to take advantage of the 64bit word size.
	www.ussrback.com /crypto/libraries/des/libdes.algorithm.txt (914 words)

	Initial Observations on the SkipJack Encryption Algorithm
		As the characteristics are build in a similar way where XORs are replaced by duplication and duplication are replaced by XOR of the subsets of parity bits, we can have the same analysis for linear cryptanalysis.
		As the characteristics are built in a similar way where XORs are replaced by duplications and duplications are replaced by XORs of the subsets of parity bits, and as Rule A and Rule B differ essentially in this way, we can have very similar analysis for linear cryptanalysis.
		The XOR operations of Rule A and Rule B after round 8 and after round 24 (on the borders between Rule A to Rule B) are consecutive without application of the G permutation in between.
	www.cs.technion.ac.il /~biham/Reports/SkipJack/note1.html (1543 words)

	Category talk:LC-TB - Wikisource
		Notice that I didn't try to cover "medical algorithms" or "avionics algorithms" or "banking algorithms," since as far as I'm concerned those labels are meaningless.
		Algorithms to fuzzy-match DNA sequences will be found under "fuzzy string searching" in -TBO; path-planning algorithms will be found under -TBL; and compound-interest formulas will be found under -TBG.
		Similarly, -TBG is only there for historical reasons (Case conversion, Hello world, Easter day, Xor swap algorithm).
	wikisource.org /wiki/Category_talk:LC-TB (407 words)

	Eksblowfish Algorithm
		The two halves are then swapped, and the whole process repeated another 15 times for a total of 16 iterations.
		The key is viewed as being cyclic; when the process reaches the end of the key, it starts reusing bits from the beginning to XOR with subkeys.
		This ensures that all subsequent state depends on both, and that no part of the algorithm can be precomputed without both salt and key.
	www.usenix.org /events/usenix99/full_papers/provos/provos_html/node4.html (787 words)

	Xor swap algorithm - Wikisource
		The Xor swap algorithm is a method of swapping two variables that does not utilize a temporary variable or directly move memory.
		Note: While this code does successfully swap the contents of the AX and BX registers, all x86 processors include an
		If both arguments point to the same buffer, or to disjoint buffers, return zero; if the arguments point to overlapping (and thus unswappable) buffers, return -1.
	wikisource.org /wiki/Xor_swap_algorithm (265 words)

	The IV in Block Cipher CBC Mode
		Some initial ideas I had would be to maybe perform a simple XOR of the IV against the first 8 bytes of the actual encryption password and then append the result to the output as before.
		Some initial ideas I had would be to maybe perform a simple XOR of the > IV against the first 8 bytes of the actual encryption password and then > append the result to the output as before.
		I used there sum mod 2^n instead of the xor to get some effect from the carry-overs.) A variant version was later proposed to the group, using the square of the sum to chain, see 'Nonlinear block chaining and whitening' of 25 Jul 00.
	www.ciphersbyritter.com /NEWS6/CBCIV.HTM (17605 words)

	[No title]
		A block cipher is a type of symmetric-key encryption algorithm in which a cryptographic key and algorithm are applied to a block of data (for example, 64 contiguous bits) at once as a group rather than to one bit at a time.
		R is first processed by an expand function, which duplicates a number of bits to produce 48 bits of output from the 32 bit input.
		This new 32 bit result is then XOR with L. Then we swap the original R and L. After doing this, we have successfully completely 1 Round, only 15 more to go.
	www.wiu.edu /mike/fall2k3/CS395_Lectures/lecture6.html (545 words)

	CS 502: Analysis of Algorithm (Site not responding. Last check: 2007-10-08)
		Computer forensics’ use has been applied to but not limited to theft of intellectual property, child pornography, internal leaking of trade secrets, physical vandalism of digital equipments, purging of data-drives, etc. There are various tools available that aid in exhaustive computer forensic investigations.
		The main objective of the course is to analyze and study algorithms and data structures for implementing algorithms.
		Then I described the two hashing algorithms: MD5 and SHA-1, which are used in the acquisition and analysis of digital evidence.
	www.bridgeport.edu /~shrestha/projects/Analysis_Algorithm.htm (3616 words)

	Techworld.com - Don't be at a loss with RAID
		Result (A XOR B) An even neater trick is that this self-reversing property works on any sequence of numbers.
		It's a nice easy algorithm, but there are performance issues – simply because any time data is written to any disk in the system, the parity disk is going to get a hammering as the parity data is written.
		There are more complicated algorithms that store more parity data, calculated in a more complex manner than our simple XOR, and which allow for up to two disks failing at once (this is how RAID 6 operates).
	www.techworld.com /storage/features/index.cfm?featureid=158&Page=2&pagePos=19 (1054 words)

	HAKMEMC -- HAKMEM Programming hacks in C (NOT proof-read)
		The algorithm is useful nevertheless, because it needs no sine or square root function, even to get started.
		X(N) and Y(N) are also expressible in closed form in the algebra of ordered pairs described under linear recurrences, but they lack the remarkable numerical stability of the "simultaneous" form of the recurrence.
		The (positive or negative) radius of each orbit is determined by the distance (forward or backward) from some origin to that corner.
	www.cl.cam.ac.uk /users/am/hakmemc.html (1217 words)

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