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US20020099746A1 - T-sequence apparatus and method for general deterministic polynomial-time primality testing and composite factoring - Google Patents

T-sequence apparatus and method for general deterministic polynomial-time primality testing and composite factoring Download PDF

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US20020099746A1
US20020099746A1 US09/559,142 US55914200A US2002099746A1 US 20020099746 A1 US20020099746 A1 US 20020099746A1 US 55914200 A US55914200 A US 55914200A US 2002099746 A1 US2002099746 A1 US 2002099746A1
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prime
mod
factoring
numbers
sequence
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Teck Tie
Shaul Backal
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BACKAL SHAUL
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Assigned to MEGANET CORPORATION reassignment MEGANET CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BACKAL, SHAUL O., TIE, TECK SING
Priority to AU63724/00A priority patent/AU6372400A/en
Assigned to BACKAL, SHAUL reassignment BACKAL, SHAUL ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MEGANET CORPORATION
Publication of US20020099746A1 publication Critical patent/US20020099746A1/en
Priority to US10/306,072 priority patent/US9542158B2/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/60Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
    • G06F7/72Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers using residue arithmetic
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/58Random or pseudo-random number generators
    • G06F7/582Pseudo-random number generators
    • G06F7/586Pseudo-random number generators using an integer algorithm, e.g. using linear congruential method
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/065Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
    • H04L9/0656Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
    • H04L9/0662Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/30Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3006Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters
    • H04L9/3033Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters details relating to pseudo-prime or prime number generation, e.g. primality test
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2207/00Indexing scheme relating to methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F2207/72Indexing scheme relating to groups G06F7/72 - G06F7/729
    • G06F2207/7204Prime number generation or prime number testing

Definitions

  • the present invention relates to prime and composite number computing and applications of the same, e.g., in the area of data security.
  • Prime numbers (2, 3, 5, 7, 11, 13, . . ., those positive integers divisible only by themselves or 1) are the most fundamental building blocks of math, and with the invention of the public key ciphers (RSA, El Gamal and the like), they now form the backbone of computer security.
  • the primality testing problem is about testing and determining whether a given arbitrary positive integer is a prime number or a composite (non-prime) number.
  • the factoring problem requires determining the composite number's prime factors. Practicality demands that these two problems have to be solved in polynomial time (computations being proportional to the number of digits and therefore fast), not exponential time (computations being proportional to the size of the numbers themselves and therefore too slow).
  • T-sequence Using a new mathematical technique called the T-sequence, the inventor has discovered a powerful primality testing method that meets all four conditions above. A similar approach can be applied to perform fast factoring for numerous special cases, a method that can, in all liklihood, be extended to the general case, making possible a general and fast factoring algorithm. (Researchers heretofore have been able to factor only in sub-exponential time, never in polynomial time.)
  • the same T-sequence can be used to construct a prime number formula (long sought after but never achieved) and a good random number generator.
  • the former can be used to generate infinitely many prime numbers of any size efficiently, and the latter can generate non-periodic and absolutely chaotic random numbers. These numbers are widely used in all areas of industrial and scientific simulations.
  • the T-sequence can be used to handle efficiently the fundamental problems concerning prime numbers (which include primality testing, factoring, prime number formula, infinite-pattern prime problem, etc.).
  • FIG. 1 is a block diagram of a prime number computing system
  • FIG. 2 is a flowchart illustrating a primality testing algorithm.
  • T-Sequences Definition.
  • n be a positive integer and l>3 be the order.
  • T n 1 + n 2 l T n 1 l ⁇ T n 1 - n 2 l
  • T terms can grow exponentially large, but with the above identities as well as modulo arithmetic and a type of binary decomposition method described below, testing a given integer for primality is straightforward.
  • T 31 3 T 16 3 ⁇ T 15 3 - 3
  • T 16 3 ( T 8 3 ) 2 - 2
  • T 15 3 T 8 3 ⁇ T 7 3 - 3
  • T 8 3 ( T 4 3 ) 2 - 2
  • T 7 3 T 4 3 ⁇ T 3 3 - 3
  • T 4 3 ( T 2 3 ) 2 - 2
  • T 3 3 T 2 3 ⁇ T 1 3 - 3
  • T 2 3 ( T 1 3 ) 2 - 2
  • T 0 3 2
  • T 1 3 3
  • this characteristic can also be used to do general polynomial time factoring of composites.
  • FIG. 1 a block diagram is shown of a computing system, e.g., a prime number computing system, in which T-sequences are used.
  • the computing system includes one or more processors, random-access memory, read-only (non-volative) memory, and an I/O subsystem.
  • the computing system is intended to be representative of all classes of computing systems, large and small, local or distributed.
  • Within memory is stored a routine for generating T-sequence terms.
  • the results of this routine are used by one or more other routines, e.g., a routine for primality testing, a routine for factoring, a prime number generator, a random number generator, etc.
  • routines find wide application, especially in data security, e.g., securely encrypting data or, by the opposite token, breaking a given encryption. The operation of various ones of these routines will now be described.
  • the T 3 sequence may be used to perform primality testing (any other T l sequence will do but T 3 is convenient for use here).
  • n an eligible candidate for prime
  • any n with the last digit 1 or 9 will be of the ⁇ l type in T 3
  • any n with the last digit 3 or 7 will be of the +l type in T 3 .
  • the period k(r) must be greater than 2. When the period is 1 or 2, that l value is not to be used.
  • a fast primality testing routine consists of the following three steps:
  • STEP B still misses some pseudoprimes or cofactor composites but when followed by STEP C, all possible exceptions in the form of proper cofactors or pseudoprimes will be sieved away, leaving only the genuine primes.
  • STEP C Find an l which is of opposite l type to that in STEP A in T 3 . If in STEP A the l type of n in T 3 is ⁇ , then in this STEP C, find an l for which the l type of n is + in T l and vice versa. This can be determined readily through the above-mentioned computations of small residue r or direct computations of T n - 1 l ⁇ 2 ⁇ ⁇ or ⁇ ⁇ l 2 - 2 ⁇ ⁇ ( mod ⁇ ⁇ n ) ⁇ ⁇ and ⁇ ⁇ T n l ⁇ l ⁇ ( mod ⁇ ⁇ n )
  • a variation of the foregoing algorithm uses the Jacobi to avoid blind trials seeking for opposite l types.
  • taking JACOBI(l 2 ⁇ 4, n) gives the l type.
  • Primality Testing Summary. Following the above method of computation ensures that this primality testing algorithm is 100% general, deterministic, provable and polynomial-time. It runs as follows:
  • n is a genuine prime whenever n satisfies the conditions in these three steps:
  • STEP A T n - 1 3 ⁇ 2 ⁇ ⁇ or ⁇ ⁇ 7 ⁇ ⁇ ( mod ⁇ ⁇ n ) ⁇ ⁇ and ⁇ ⁇ T n 3 ⁇ 3 ⁇ ⁇ ( mod ⁇ ⁇ n )
  • STEP C T n ⁇ 1 l ⁇ 2 or l 2 ⁇ 2 (mod n) and T n l ⁇ l (mod n) where the l type of n in T l is opposite to that in T 3 as in STEP A.
  • a promising and viable factoring method is also based on the T-sequences. This method is unlike any previous method.
  • T-sequences allow all forms of composites to be factored, without exception, in polynomial time, simply because binary decomposition modulo C is fundamentally polynomial time. So far, mathematicians have only found exponential or sub-exponential time factoring algorithms for composites less than 200 digits, in general, and no polynomial-time factoring exists for even special forms of composites like the Mersenne numbers 2 M ⁇ 1, etc. A simple extension of the T sequences, however, immediately provides just such a polynomial-time factoring algorithm PTFA) for numerous special form composites with infinite membership.
  • PTFA polynomial-time factoring algorithm
  • ⁇ 2 is used when the periods p+1 or p ⁇ 1 divides exactly into f(C) and +2 is used whenever f(C) divided by p+1 or p ⁇ 1 gives a residue of p ⁇ 1 2 ,
  • f(C) aC 3 ⁇ bC 2 ⁇ cC 1 ⁇ d where 0 ⁇ a, b, c, d ⁇ 4.
  • this method bears a strikingly close relationship to the elliptic curve method. It is general and always polynomial time. No counterexamples have so far been found. Also very effective are the above-mentioned small residue factoring sieve as well as a quadratic polynomial factoring sieve not described here. Composites of an arbitrary number of prime factors can be handled and factored too. A 100% complete and efficient PTFA should be based upon such a formula or similar one.
  • (mod n) is factored by taking a ( R n l ) 2 ⁇ bR n l ⁇ c
  • Prime Number Formula Traditionally, a prime number formula (which has never been found) has always had these requirements:
  • Prime number formula of this type can be constructed, upon reflection, it may be seen that the third requirement is inconsistent with the very definition of prime numbers, namely that they cannot be divided exactly by any other numbers other than themselves and 1.
  • the implication is that the primality of a positive integer n needs to be determined by a legitimate polynomial-time primality testing algorithm. Whether n is prime or composite cannot be ascertained right away. Rather, n must be tested for primality.
  • a prime number formula which is supposed to generate primes and not composites also needs to obey such a fundamental requirement.
  • Prime number formula is in essence one version of a primality testing algorithm; whereas the traditional formulation of a prime number formula is an NP problem, the foregoing formulation recast the problem such that NP ⁇ P.
  • a new prime number formula of the type described may be arrived at by making use of a revised version of the Fortune Conjecture, i.e., P i+1 ⁇ P 1 P 2 P 3 . . . Pi is always a prime. This can be shown to be equivalent to the conjecture that the smallest gap between two consecutive primes P i+1 , and P i is (lnP i lnlnP i ) 2 . If this gap is simplified to ln 2 P i , then following Euclid's celebrated proof for the infinity of prime numbers, one can easily show that Fortune Conjecture is equivalent to this smallest gap conjecture. The validity of these two conjectures are well substantiated empirically as well as theoretically.
  • RNG random number generator
  • the foregoing primality testing algorithm can be used generate an abundance of large primes such as cannot be generated in any other way.
  • the set of last prime digits can also be generated and arranged in all sorts of arbitrary ways.
  • the seeds can be added or subtracted in any which way too. Without a complete knowledge of the exact seeds and their mathematical operations, no one can reproduce or deduce this type of random digits of the primes.
  • These random digits of primes behave in just as chaotic fashion as the physical subatomic particles in their distribution. Therefore this method can conveniently generate any length of random digits or numbers desired to use in mathematical research or industrial simulation.
  • This generator of random digits can be implemented easily and efficiently in both hardware and software.
  • Conventional RNGs such as linear or non-linear feedback shift registers always carry period patterns which are inherent. Non-periodicity is inherent in the foregoing random prime digit generator.
  • This RNG can also be easily modified into a simple but innovative cipher: a function F 1 , (such as transposition, shuffling, etc.) that operates on the last prime digit and another function F 2 that computes and determines the seeds are both kept secret.
  • F 2 is coupled to a simple but chaotic physical system such as dice-throwing, radioactive matter, etc., for the first random input as seeds.
  • the functions F 2 and F 1 are used to generate a truly random string of digits such as 9, 7, 3, 1, 1, 9, 3, 3, 7, 3, 1, 3, 7, 9, 3, 9, 1, 1, 7, 7. This string of random digits can be used as a one-time pad for encryption.
  • the receiver who is informed only of the starting seeds (from the physical system input) can decrypt the ciphertext to obtain the plaintext since he also possesses F 1 , and F 2 as well as the relevant table of primes like the sender. As long as F 1 and F 2 are kept secret, no eavesdropper can decrypt the ciphertext.
  • the cipher can even be timed accordingly so that the functions F 1 and F 2 change according to time changes or context changes. In any event, math theory about primes guarantees that the string of random digits thus generated are absolutely chaotic. No fixed inter-relationship can be derived from among themselves.

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