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DESCRIPTION=Revolutionary new cipher designs. An introduction to cryptography, crypto glossary, cryptography dictionary, technical papers, Usenet discussions and crypto links.;
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Text of the page (random words):
ously thus producing vast bandwidth across huge blocks in easily designed ram based chips a bbm can be seen as a way of emulating larger tables using small ones this is interesting because a conventional block cipher merely emulates a table far too large to build a construction based on small keyable tables makes sense currently the table only realization seems most desirable because that avoids the linear transformations of the other models tables hold the maximum amount of keyed and nonlinear state and that state is what an opponent must unravel to break the cipher the cipher is keyed by constructing a particular orthogonal latin square pair for each mixing element which is fairly easy to do balanced block mixers for block cipher cryptography 23k the current html article active balanced block mixing in javascript 21k the balanced block mixing computation in mod 2 polynomials with the ability to calculate results and show the whole table also 4 element fft style block mixing keyed balanced size preserving block mixing transforms now balanced block mixers 26k the original ascii article large block des mixing development 18k the overall development project mixing ciphers using balanced block mixing scalable and fast block cipher designs with guaranteed diffusion and dynamically variable block size in power of 2 steps here we have a typical hybrid realization the figure shows connections from a block of 8 input bytes at the top which are each substituted through keyed 8 bit invertible tables or s boxes each table represents about 1684 bits of keying each yellow diamond represents half of a linear bbm component each mixing takes two bytes in and produces a 2 byte result the mixings are arranged in an fft style pattern which mixes every byte across the entire block using only byte mixings we have a top row of substitutions then a complete mixing then we have another row of substitutions and another complete mixing then we have a final substitution row which produces 8 bytes of ciphertext out the bottom fft style mixing patterns can be computed at ciphering time so blocks of dynamically arbitrary power of 2 size can be ciphered extremely large blocks can be ciphered almost as fast per byte as smaller blocks thus possibly avoiding cbc chaining and providing room for authentication and dynamic keying fields here we have a typical hardware table only realization this is again an 8 byte block but the 16 input lines are 4 bit nybbles instead of 8 bit bytes each bbm mixing is a key selected orthogonal latin square pair in a ram table since the mixing is inherently nonlinear substitution tables are unnecessary there are four sublayers each consisting of eight bbm tables that mix every input bit to every output bit each table holds an order 16 ols in 256 bytes thus each sublayer needs 8 256 2048 bytes of store since there are 4 sublayers the total store is 2048 4 8192 bytes for the whole cipher in hardware mixing ciphers can be much faster than most other block cipher approaches because all mixings can operate simultaneously table mixings are just table look ups with a single ram read each chip layout consists almost entirely of ram and data bus hardware bandwidth typically is a full block per clock cycle with a different block being processed in each mixing sublayer with a 450mhz clock 8 byte block designs do 3 600 megabytes sec doubling the block size doubles the processing bandwidth but also doubles the number of tables plus adding another mixing sublayer it is possible to save ram by using order 4 ols mixings which need only 8 bytes of store 16 entries of 4 bits each since they mix only 2 bit pairs we need 16 tables per 8 byte block then we need another sublayer for a total of 5 and thus 5 16 80 mixings that implies 80 8 640 bytes of store for the whole 8 byte block cipher this cipher still has 80 12 75 1020 bits of keying but the advantage is in larger block widths at the 64 byte block size we start to reap huge block cipher advantages while running at 28 800 megabytes sec with order 4 tables we need 128 tables per sublayer with 8 sublayers and 128 8 12 75 13 056 bits of keying this design needs only 128 8 8 8192 bytes of ram in 1024 independent 8 byte ram blobs for the full cipher mixing cipher summary show in html pseudo slides a mixing core for block cipher cryptography 35k description figures and discussion a keyed shuffling system for block cipher cryptography 17k key hashing and rng figures and discussion active balanced block mixing in javascript 21k the balanced block mixing computation in mod 2 polynomials with the ability to calculate results and show the whole table also 4 element fft style block mixing measured boolean function nonlinearity in mixing cipher constructions 24k experimental nonlinearity distributions for random 5 bit tables 10 bit tables and 10 bit mixing constructions efficient fft style mixing for block cipher cryptography 10k description figures and routines in both pascal and c for a straightforward and efficient mixing pattern extreme hardware speed in large block mixing ciphers 8k a sketch of a practical chip realization of a 64 byte block cipher operating at up to 12 8 gb sec hardware blowfish and mixing ciphers compared 6k a sketch comparing chip area and functionality between several 64 bit blowfish and mixing cipher realizations fencing and mixing ciphers 11k prototype implementations and tests experimental realizations initialize the full 128k table store in 76 msec fenced des 24k the technology in action variable size block ciphers u s patent 5 727 062 scalable and fast cipher designs with good block cipher diffusion and dynamically variable block size to the byte the figure shows at the top connections from 5 plaintext bytes of a presumably larger block which are each substituted and then participate in a right going one way diffusion the hourglass shapes are bbm components which mix in the direction of the arrow two input values into two output values subsequent substitutions and diffusions eventually produce 5 ciphertext bytes on the bottom connections the use of large blocks can avoid the need for cbc chaining and provide room for authentication and dynamic keying fields the ability to cipher blocks of odd size supports the ciphering of existing data structures without re design of the existing system the use of random size blocks in file ciphering provides an unexpected new level of strength since the bytes composing any particular block are unknown to an attacker a variable size core for block cipher cryptography 37k description figure and discussion a keyed shuffling system for block cipher cryptography 17k key hashing and rng figures and discussion active balanced block mixing in javascript 21k the balanced block mixing computation in mod 2 polynomials with the ability to calculate results and show the whole table also 4 element fft style block mixing measured boolean function nonlinearity in variable size block ciphers 29k experimental nonlinearity distributions for random 4 bit tables random 12 bit tables and 12 bit vsbc constructions efficient one way mixing diffusions 10k description figures and routines in both pascal and c for straightforward and efficient one way mixing layers defined plaintext attack on a simplified bbm vsbc 12k 5 gif a currently unsuccessful approach variable size block ciphers 24k the older html article with gif graphics variable size block cipher designs realized prototypes 13k the newer article with ascii graphics showing actual experience with vsbc designs vsbc newsgroup discussion 6k the original sci crypt discussions technical articles attempts at attacking solving and explaining some aspects of cryptographic design dynamic transposition revisited again 2001 40k a block cipher based on transposition using stream cipher techniques generates a perfect secrecy transformation on a block by block basis the second expanded version of the revisited article dynamic transposition ciphering 2001 730k the original revisited article with controversial sci crypt conversations on serious dynamic transposition ciphering cryptography is staying with the herd really best copyright 1999 ieee a guest internet watch column in the ieee computer society magazine for august 1999 computer 32 8 94 95 the commonly accepted argument that cryptography is too important to allow the use of unproven ciphers is shown to be fundamentally flawed also see comments on staying with the herd 1999 295k experimental characterization of recorded noise 1999 11k index into 25 subpages with 3 gif graphs each characteristics of experimental noise generators are calculated and graphed random noise sources 1999 25k many gif s and jpg s modern simple tested battery powered designs produce unknowable analog noise to be digitized by a sound card orthogonal latin squares nonlinear balanced block mixers and mixing ciphers 1998 31k the construction of nonlinear orthogonal latin squares of order 16 and 8 bit nonlinear bbm s with experimental results the sci crypt article 1998 09 22 terry ritter orthogonal latin squares nonlinear bbm s the original article practical latin square combiners 1998 22k the construction of nonlinear latin squares of order 16 for combining 4 bit nybbles the sci crypt article 1998 09 16 terry ritter practical latin square combiners the original article 1998 09 16 terry ritter correction to figure 2 1998 09 18 pierre abbat three other ways to transform one latin square into another break this 8 bit block mixing cipher 1998 57k an 8 bit cipher model which uses keyed 4 bit tables is presented to explore the strength of the structure the sci crypt article 1998 04 19 terry ritter break this 8 bit block cipher the original article 1998 04 25 david hopwood it would also be a weakness in the cipher if it were possible given some subset of the plaintext ciphertext pairs to find other plaintext ciphertext pairs and the linear bbm is not sufficiently well hidden by the tables 1998 04 28 terry ritter this weakness is of course inherent in every possible block cipher under known plaintext conditions 1998 04 29 terry ritter the apparently reasonable idea that 32 such equations exist or that even 2 equations exist with the same 2 unknowns appears false 1998 05 15 david hopwood there is not enough information to uniquely determine the table entries however the key space is divided into classes of equivalent keys and it is possible to find which equivalence class was used which is all that a cryptanalyst needs break this 4 bit block mixing cipher 1998 8k a 4 bit cipher model which uses keyed 2 bit tables is presented as a challenge to explore the strength of the structure the sci crypt article measured distant avalanche in large block ciphers 1998 34k the possibility of mixing locality is explored experimentally in mixing and variable size block ciphers the sci crypt article 1998 03 05 terry ritter measured distant avalanche in large block ciphers the original article 1998 03 06 gary ardell i don t see the reasoning behind focusing on changes in individual bytes rather than on individual bits 1998 03 06 terry ritter if we want to detect problems in 8 bit mixing 8 bit values seem the appropriate size to address 1998 03 09 gary ardell run it through diehard to see what if any failures show up 1998 03 10 terry ritter it would be wrong to simply throw ciphertext into a file and expect general tests to somehow derive information from the result 1998 03 06 john savard lucifer with its 128 bit blocks was intended to handle blocks containing 64 bits of data with identifying information and a serial counter for randomization in the other 64 bits 1998 03 07 terry ritter what i call a dynamic keying field is indeed described in one of the feistel patents now expired but it is not particularly useful when there are only 64 bits in a block measured boolean function nonlinearity in feistel cipher constructions 1998 32k the experimental nonlinearity distributions for random 5 bit tables random 10 bit tables and 10 bit feistel constructions are developed and compared the sci crypt article measured boolean function nonlinearity in variable size block ciphers 1998 29k the experimental nonlinearity distributions for random 4 bit tables random 12 bit tables and 12 bit vsbc constructions are developed and compared the sci crypt article measuring boolean function nonlinearity by walsh transform 1998 20k how to compute the distance to an affine boolean function by hand how to compute a fast walsh transform fwt by hand or by pascal routine the sci crypt article measured boolean function nonlinearity in mixing cipher constructions 1997 25k the experimental nonlinearity distributions for random 5 bit tables random 10 bit tables and 10 bit mixing constructions are developed and compared the sci crypt article chi square bias in runs up down rng tests 1997 13k correct expectation values for runs up and runs down rng testing the sci crypt article fenced des 1994 24k a larger and better des a 256 bit block cipher using des as a trusted component four separate des operations are balanced block mixed and protected by outer layers of substitution operations fenced des 24k the current html introduction fencing and mixing ciphers 11k an announcement of realized prototype designs with comparative speed measurements fenced des 25k the original article ascii the context of the fenced des design 42k the later and better article ascii large block des development project the original project large block discussion of august and september 1996 on sci crypt arguments against large block designs by jerry leichter arguments against arguments against large block designs by terry ritter estimating population from repetitions in accumulated random samples 1994 82k the birthday paradox by repeatedly drawing values from a given population eventually some values will appear again or repeat a new relationship exactly predicts population from the average number of repetitions population estimation can be used to check the amount of effective state in a really random generator and the number of keys in a block cipher the published refereed article with many gif graphics also see the population estimation worksheets in javascript for an implementation voice and video cryptography in a dsp environment 1992 27k an intro to crypto for dsp designers presented at the second annual texas instruments tms320 educators conference august 5 7 1992 houston texas the published article the efficient generation of cryptographic confusion sequences 1991 168k a survey of the various techniques used to build the running key confusion generators used in stream ciphers 51 pp 213 refs the published article the politics of software patents 1991 30k a response to the november 1990 dr dobb s journal article by the league for programming freedom the lpf paper against software patents http lpf ai mit edu patents against software patents html appears to be the same as ...