Abstract: A data compression method includes inputting a data sequence that includes first data strings and second data strings alternating with each other, each of the first data strings containing one or more first data all of which have a same predetermined value, each of the second data strings containing one or more second data different from the predetermined value, determining first numbers and second numbers from a beginning of the input data sequence sequentially, each of the first numbers being a number of the first data in a respective one of the first data strings, and each of the second numbers being a number of the second data in a respective one of the second data strings, and arranging the first numbers, the second numbers, and the second data strings in a cyclic manner to generate compressed data.

Abstract: An information processing apparatus includes a processor that acquires an operation result on an input data by referring to a look-up table that stores an operation result of an operation process, including an obfuscating operation that includes ordering of bits, an exclusive-OR operation on a random number, and a multiplication on a Galois field, performed on data.

Abstract: An information processing apparatus includes a memory, and a processor coupled to the memory and configured to generate, from a common key used for symmetric key cryptography, and from either an encryption process using the common key or a decryption process using the common key, an encryption lookup table corresponding to the encryption process or a decryption lookup table corresponding to the decryption process by using white box cryptography, and disseminate the generated encryption lookup table or the generated decryption lookup table as a public key.

Abstract: With respect to a method for execution by an information processing apparatus, the method includes calculating a reciprocal in multiplication on a residue field modulo a power of 2.

Abstract: A data compression method includes inputting a data sequence that includes first data strings and second data strings alternating with each other, each of the first data strings containing one or more first data all of which have a same predetermined value, each of the second data strings containing one or more second data different from the predetermined value, determining first numbers and second numbers from a beginning of the input data sequence sequentially, each of the first numbers being a number of the first data in a respective one of the first data strings, and each of the second numbers being a number of the second data in a respective one of the second data strings, and arranging the first numbers, the second numbers, and the second data strings in a cyclic manner to generate compressed data.

Abstract: An information processing apparatus includes a processor that acquires an operation result on an input data by referring to a look-up table that stores an operation result of an operation process, including an obfuscating operation that includes ordering of bits, an exclusive-OR operation on a random number, and a multiplication on a Galois field, performed on data.

Abstract: An information processing apparatus includes a memory, and a processor coupled to the memory and configured to generate, from a common key used for symmetric key cryptography, and from either an encryption process using the common key or a decryption process using the common key, an encryption lookup table corresponding to the encryption process or a decryption lookup table corresponding to the decryption process by using white box cryptography, and disseminate the generated encryption lookup table or the generated decryption lookup table as a public key.

Abstract: An information processing apparatus that processes a plurality of encrypted text data items includes: an input unit for inputting first data and second data that are the encrypted text data items; a first transforming unit for transforming the first data to first transformed data based on a first table; a second transforming unit for transforming the second data to second transformed data based on a second table; an addition unit for calculating an addition result by adding the first transformed data and the second transformed data; a remainder calculation unit for obtaining a remainder by dividing the addition result by an exponential number having 2 as a base and having the number of bits of the encrypted text data items as an exponent; and a third transforming unit for outputting an output result by transforming the remainder based on a third table.

Abstract: A data processing apparatus for rearranging multiple items of data to be input, includes a processor; a memory; and an input unit configured to receive as input a rearrangement number with which a rearrangement pattern of the data can be identified. The processor executes calculating a rearrangement destination for each of the items of the data based on the rearrangement number; and rearranging the data based on the rearrangement destinations.

Abstract: An information processing apparatus is provided that performs information processing for encrypting data using AES, which includes performing a process of generating round key data on a one-byte-by-one-byte basis, performing a row shift transformation that is a process of performing row shifting for the data by use of a row shift table, performing a byte substitution transformation that is a process of performing byte substitution for the data having undergone the row shift transformation by use of a byte substitution table that is a one-dimensional array, performing a column mix transformation that is a process of performing column mixing for the data having undergone the byte substitution transformation based on equivalent expressions, performing a key add transformation that is a process of performing an exclusive-OR operation based on the round key data and the data having undergone the column mix transformation, wherein the row shift transformation, the byte substitution transformation, the column mix tr

Abstract: An information processing apparatus for encrypting or decrypting data by AES scheme, includes a processor; and a memory storing a first table including mixed components based on exclusive OR of first random components and key data, a second table, and a third table. The processor executes selecting four bytes of sub-round data from the data; a first transformation based on the first table, for each of one-byte data items of the sub-round data, to generate first data by taking exclusive OR of the one-byte data items and the mixed components; a second transformation based on the second table to transform the first data into second data; a third transformation based on the third table to transform the second data into multiple items of third data; calculating exclusive OR of the third data.

Abstract: An information processing apparatus that processes a plurality of encrypted text data items includes: an input unit for inputting first data and second data that are the encrypted text data items; a first transforming unit for transforming the first data to first transformed data based on a first table; a second transforming unit for transforming the second data to second transformed data based on a second table; an addition unit for calculating an addition result by adding the first transformed data and the second transformed data; a remainder calculation unit for obtaining a remainder by dividing the addition result by an exponential number having 2 as a base and having the number of bits of the encrypted text data items as an exponent; and a third transforming unit for outputting an output result by transforming the remainder based on a third table.

Abstract: A data processing apparatus that encrypts or decrypts data by Advanced Encryption Standard in which a plurality of key data are respectively prepared for a plurality of round processes that are performed in order, includes a selector that selects sub-round data of 4 bytes from input data that is a process target of a first round process; a converter that converts each data of 1 byte of the sub-round data, based on a first table by which a result same as performing a predetermined process is output, to generate converted data of 4 bytes; and an exclusive OR calculator that calculates exclusive OR of the converted data of the sub-round data, respectively, the predetermined process including an encryption process or a decryption process using at least a part of key data prepared for a second round process which is performed later than the first round process.

Abstract: An information processing apparatus has an encryption part that encrypts by block encryption, and is embeddable in an electronic apparatus, and achieves the above object by segmenting an authentication target message into one or more blocks for every 128 bits, the authentication target message including at least a predetermined authentication parameter and first encryption information that is obtained by encrypting plaintext information by the encryption part, successively computing each of the one or more segmented blocks by a GHASH function including a predetermined algorithm, using a plurality of 8-bit arrays including 16 elements, and generating second encryption information that is obtained by encrypting a computed result by the encryption part, to generate an authentication tag.

Abstract: A data processing apparatus for rearranging multiple items of data to be input, includes a processor; a memory; and an input unit configured to receive as input a rearrangement number with which a rearrangement pattern of the data can be identified. The processor executes calculating a rearrangement destination for each of the items of the data based on the rearrangement number; and rearranging the data based on the rearrangement destinations.

Abstract: An information processing apparatus for encrypting or decrypting data by AES scheme, includes a processor; and a memory storing a first table including mixed components based on exclusive OR of first random components and key data, a second table, and a third table. The processor executes selecting four bytes of sub-round data from the data; a first transformation based on the first table, for each of one-byte data items of the sub-round data, to generate first data by taking exclusive OR of the one-byte data items and the mixed components; a second transformation based on the second table to transform the first data into second data; a third transformation based on the third table to transform the second data into multiple items of third data; calculating exclusive OR of the third data.

Abstract: A data processing apparatus that encrypts or decrypts data by AES in which a plurality of key data are respectively prepared for a plurality of round processes that are performed in order, includes a selector that selects sub-round data of 4 bytes from input data that is a process target of a first round process; a converter that converts each data of 1 byte of the sub-round data, based on a first table by which a result same as performing a predetermined process is output, to generate converted data of 4 bytes; and an exclusive OR calculator that calculates exclusive OR of the converted data of the sub-round data, respectively, the predetermined process including an encryption process or a decryption process using at least a part of key data prepared for a second round process which is performed later than the first round process.

Abstract: An information processing apparatus has an encryption part that encrypts by block encryption, and is embeddable in an electronic apparatus, and achieves the above object by segmenting an authentication target message into one or more blocks for every 128 bits, the authentication target message including at least a predetermined authentication parameter and first encryption information that is obtained by encrypting plaintext information by the encryption part, successively computing each of the one or more segmented blocks by a GHASH function including a predetermined algorithm, using a plurality of 8-bit arrays including 16 elements, and generating second encryption information that is obtained by encrypting a computed result by the encryption part, to generate an authentication tag.

Abstract: An information processing apparatus is provided that performs information processing for encrypting data using AES, which includes performing a process of generating round key data on a one-byte-by-one-byte basis, performing a row shift transformation that is a process of performing row shifting for the data by use of a row shift table, performing a byte substitution transformation that is a process of performing byte substitution for the data having undergone the row shift transformation by use of a byte substitution table that is a one-dimensional array, performing a column mix transformation that is a process of performing column mixing for the data having undergone the byte substitution transformation based on equivalent expressions, performing a key add transformation that is a process of performing an exclusive-OR operation based on the round key data and the data having undergone the column mix transformation, wherein the row shift transformation, the byte substitution transformation, the column mix tr