8 results about "Endianness" patented technology

Provided in the embodiments of the present disclosure are a data compression method, a data decompression method, a computing device, a computer storage medium and a computer program product. The data compression method comprises: determining data to be compressed that has been subjected to character coding according to a unicode coding format; according to a byte order, reading character data from the data to be compressed, and determining a first dictionary or a second dictionary hit by the character data; searching for a coding sub-space corresponding to the first dictionary or the second dictionary, and determining coded values, in corresponding coding sub-spaces, of dictionary data hit by the character data, so as to obtain a coded-value set corresponding to the data to be compressed; and on the basis of the coded-value set and the first dictionary, obtaining compressed data.

The embodiment of the invention provides a data compression method, a data decompression method, computing equipment, a computer storage medium and a computer program product. The data compression method comprises the following steps: determining to-be-compressed data subjected to character coding according to a unified code coding format; reading character data from the to-be-compressed data according to a byte sequence, and determining a first dictionary or a second dictionary hit by the character data; searching coding subspaces respectively corresponding to the first dictionary or the second dictionary, and determining coding numerical values of dictionary data hit by the character data in the corresponding coding subspaces to obtain a coding numerical value group corresponding to the data to be compressed; and obtaining compressed data based on the coding numerical value group and the first dictionary. According to the technical scheme provided by the embodiment of the invention, the compression rate and the compression speed of data compression are ensured, and the compression performance is improved.

This application provides a data storage method, apparatus, and business system across an HBase cluster. The method includes: upon receiving a data upload message, obtaining the location information, first time information, and first identification information of the data to be stored; encoding the location information, first time information, and first identification information to obtain an index number, which uniquely identifies the data to be stored; reversing the index number to obtain the row key value of the data to be stored; and storing the data to be stored in a first target partition on a target server according to the row key value. The first target partition is the storage partition corresponding to the byte of the first identification information in the row key value, and the byte order of the row key value and the index number is reversed. This method solves the problem in existing technologies where storing files sequentially in the same area causes hotspot phenomena and reduces data storage speed.

This invention discloses an archive encryption method and system based on a six-dimensional multi-scroll conservative hyperchaotic system, relating to the fields of information security and data encryption technology. The method involves constructing a six-dimensional multi-scroll conservative hyperchaotic system; converting the archive text to be encrypted into a byte sequence and performing grouping processing; obtaining the hash value of each grouped text block; linearly mixing the user-input initial vector with the normalized hash value to generate a system key; initializing the chaotic system using the key and iteratively generating a chaotic sequence; flattening the text blocks; rearranging the byte order according to the scrambled index sequence; performing Gray code conversion on each byte in the scrambled result and then performing an XOR operation; and concatenating the temporary ciphertext streams of each group in their original order to form a complete ciphertext byte stream as the final encryption result. This invention enhances the initial value sensitivity and randomness of the system; and simultaneously improves the confidentiality and anti-attack performance of archive data during transmission and storage.

This application provides a method and apparatus for transmitting data packets, relating to the field of communications, to improve the utilization of transmission resources. The method includes: encapsulating the data to be transmitted to obtain data packets; filling the encapsulated data packets into the block body of a logical block according to byte order; wherein, when FEC is enabled, the logical block includes a block body and a block tail filled with checksum data; when FEC is disabled, all bytes within the LLB are the block body.

This system comprises an arithmetic processing unit for performing arithmetic processing, and a memory for storing data handled by the arithmetic processing unit. The system is provided with: a conversion circuit for executing, in hardware, conversion processing for converting the byte order of input data between big endian and little endian; and a table for storing access patterns corresponding to a transmission source and a reception destination of the input data. The conversion circuit determines the access pattern by referring to the table, and executes conversion into big endian or conversion into little endian according to the determined access pattern.

The invention provides an authorization binding method and a communication system, and relates to the technical field of communication, the method is applied to a server, and the method comprises the following steps: obtaining a byte sequence table and an equipment sequence code sent by an injection molding machine; and performing byte confusion on the byte sequence table based on the equipment sequence code to generate an encryption table and a decryption table. And the decryption table is sent to the injection molding machine, so that the injection molding machine activates the authorization state. And obtaining a binding request sent by the security gateway, calling the corresponding encryption table and the equipment sequence code based on the binding request, and performing ciphertext communication verification with the target injection molding machine by using the encryption table through an unvarnished transmission channel with the target injection molding machine established by the security gateway. And if the verification is passed, sending the encryption table and the equipment sequence code to the security gateway to complete one-to-one binding of the security gateway and the target injection molding machine, thereby realizing reliable operation and data security of the injection molding machine networking system.

The invention discloses an archive encryption method and system based on a six-dimensional multi-scroll conservative hyperchaotic system, and relates to the technical field of information security and data encryption. A six-dimensional multi-reel conservative hyperchaotic system is constructed; the file text to be encrypted is converted into byte sequences, and grouping processing is carried out; obtaining a hash value of each text block after grouping, and performing linear mixing on an initial vector input by a user and the normalized hash value to generate a system key Key; using a key Key to initialize a chaotic system and iteratively generate a chaotic sequence; flattening the text blocks, rearranging a byte sequence according to a scrambling index sequence, performing Gray code conversion on each byte in a scrambling result, and then performing XOR operation; sequentially splicing the temporary ciphertext streams of each group according to an original sequence to form a complete ciphertext stream; and taking the result as a final encryption result. According to the invention, the initial value sensitivity and randomness of the system are enhanced; and meanwhile, the confidentiality and the anti-attack performance of the archive data in the transmission and storage process are improved.