摘要:
A method for generating cryptographically secure (or unpredictable) pseudo-random numbers uses simple functions whose inverse is not a well-defined function and has a large number of branches, although the inverse could be easily computed on each particular branch. In this way the sequence of numbers is practically unpredictable and at the same time may be generated using very simple functions. A generator of such a pseudo-random bit sequence comprises circuit means for storing bit strings representing integer numbers of the pseudo-random sequence; a shift register coupled to the circuit means; a command circuit generating shift commands for the shift register; second circuit means for storing the bits output by the shift register; an adder modulo 2 summing the bits stored in the second circuit means, generating a bit of the chaos-based pseudo-random bit sequence; a second adder summing up the bit strings currently stored in the shift register and in the first circuit means, generating a bit string representing a successive number of the pseudo-random sequence.
摘要:
A hosting structure of nanometric components is described comprising a substrate, a first multi-spacer level comprising a first plurality of spacers including first conductive spacers parallel to each other, and at least a second multi-spacer level realized above said first multi-spacer level and comprising a second plurality of spacers arranged transversally to said first plurality of spacers and including at least a lower discontinuous insulating layer and an upper layer, including in turn second conductive spacers. In particular, each pair of spacers of the second multi-spacer level defines with a spacer of the first multi-spacer level a plurality of nanometric hosting seats having at least a first and a second conduction terminal realized by portions of the first conductive spacers and of the second conductive spacers faced in the hosting seats. A method for manufacturing such a structure is also described.
摘要:
A quantum gate performs the superposition operation of a Grover's or of a Deutsch-Jozsa's quantum algorithm in a very fast manner. This is done by performing all multiplications by using logic gates that immediately outputs the result. The superposition operation includes performing the Hadamard rotation over an input set of vectors for producing a set of rotated vectors, and calculating the tensor product of all the rotated vectors for outputting a linear superposition set of vectors. The tensor product of all the rotated vectors is carried out by the logic gates.
摘要:
A hosting structure of nanometric components is described advantageously comprising: a substrate; n array levels on said substrate, with n≧2, arranged consecutively on growing and parallel planes, each including a plurality of conductive spacers alternated with a plurality of insulating spacers and substantially perpendicular to said substrate, with definition between consecutive conductive spacers of at least a gap, conductive spacers of consecutive array levels lying on distinct and parallel planes, said gaps of different array levels being at least partially aligned along a direction substantially perpendicular to said substrate with definition of a plurality of transversal hosting seats extended along said direction and suitable for hosting at least a nanometric component. A nanometric electronic device is also described comprising such a hosting structure and a method for realizing it.
摘要:
A nanometric device comprising a substrate; a plurality of conductive spacers of a conductive material, each conductive spacer being arranged on top of and transverse to the substrate, the conductive spacers including respective pairs of conductive spacers defining respective hosting seats each of less than 30 nm wide; and a plurality of nanometric elements respectively accommodated in the hosting seats.
摘要:
A hosting structure of nanometric components is described comprising a substrate, a first multi-spacer level comprising a first plurality of spacers including first conductive spacers parallel to each other, and at least a second multi-spacer level realized above said first multi-spacer level and comprising a second plurality of spacers arranged transversally to said first plurality of spacers and including at least a lower discontinuous insulating layer and an upper layer, including in turn second conductive spacers. In particular, each pair of spacers of the second multi-spacer level defines with a spacer of the first multi-spacer level a plurality of nanometric hosting seats having at least a first and a second conduction terminal realized by portions of the first conductive spacers and of the second conductive spacers faced in the hosting seats. A method for manufacturing such a structure is also described.
摘要:
In an encryption/decryption system for converting data signals between an unencrypted plaintext format and an encrypted ciphertext format plurality of round modules are provided permitting a respective set of input data signals (TEXT IN) to generate a respective set of output data signals (TEXT OUT) by means of transformation controlled by a round key (SUBKEY). The transformation is identified by at least one map function derived from a chaotic map.
摘要:
Method for manufacturing a hosting structure of nanometric elements comprising the steps of depositing on an upper surface of a substrate, of a first material, a block-seed having at least one side wall. Depositing on at least one portion of sad surface and on the block-seed a first layer, of predetermined thickness of a second material, and subsequently selectively and anisotropically etching it to form a spacer-seed adjacent to the side wall. The cycle of deposition and selective etching steps of a predetermined material are repeated n times (n≧2), with at least one spacer formed in each cycle. This predetermined material is different for each pair of consecutive depositions. The above n steps provides at least one multilayer body. Further selective etching removes every other spacers to provide a plurality of nanometric hosting seats, which forms contact terminals for a plurality of molecular transistors hosted in said hosting seats.
摘要:
The invention relates to a method for reducing noise of the pulsive type in digital video receiver sets. The method consists of picking up a noise-affected sample of a video signal and replacing it with a weighted average of samples located in the contour thereof; this allows the noise component to be fittered out with a lower load, in terms of circuit complexity, on the TV set.
摘要:
A nanometric device comprising a substrate; a plurality of conductive spacers of a conductive material, each conductive spacer being arranged on top of and transverse to the substrate, the conductive spacers including respective pairs of conductive spacers defining respective hosting seats each of less than 30 nm wide; and a plurality of nanometric elements respectively accommodated in the hosting seats.